2020 GMC SIERRA 1500

What owners reported to NHTSA, ranked by how often and how seriously.

This is complaint data, not a random sample.

It only includes owners who chose to file a federal complaint, so it over-represents dramatic and safety-related problems and under-represents minor issues an owner just had fixed without reporting. Read this as what NHTSA complainants report most, not as this vehicle's true failure rate. Full methodology.

Component ranking

  1. #1

    engine internal

    23 stranded, 108 unsafe, 3 annoyance

    134
    incidents

    Mileage not reported in 84% of these reports - too few people reported an actual figure to show a reliable typical mileage.

    • "WITHIN 3 MONTHS (<4000 MILES) FROM PURCHASE VEHICLE BEGAN SPUTTERING WITH HESITATION, AND TICKING NOISE FROM ENGINE WHILE IN MOTION FOLLOWED BY MULTIPLE ALERTS POSTING ON DRIVER DISPLAY. VEHICLE DISPLAYS LOSS OF POWER, AND STRUGGLES TO KEEP UP WITH TRAFFIC.…"~3,800 mi, complaint #1719727
    • "AFTER VEHICLE SITS IDLE FOR A WHILE, THE VEHICLE MAKES A HIGH PITCH WHISTLING SOUND ON STARTUP THAT LAST FOR APPROXIMATELY MINUTE OF DRIVING."~7,000 mi, complaint #1677276
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that shortly after refueling while driving under 15 MPH, the check engine and service emissions warning light illuminated. The contact stated that an unknown reset was performed related to TSB: 101736…"~46,000 mi, complaint #1781986
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while accelerating from a complete stop on several occasions, an abnormal clicking sound was heard from the engine compartment. The vehicle was taken to the dealer, where it was diagnosed with a…"~75,127 mi, complaint #2223661
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed 60 miles away from home, the vehicle lost automotive power and stalled. The contact stated that the vehicle started smoking. Several unknown warning lights w…"~167,570 mi, complaint #2199424
  2. #2

    transmission automatic

    4 stranded, 34 unsafe, 1 annoyance

    39
    incidents

    Commonly reported, insufficient mileage data - n=16, median 60,000 mi, no reliable range below 25 reports.

    • "AT 550 MILES HAD TO TOW TO DEALER. THEY SAID NEEDED TO REPROGRAM TRANSMISSION. NOW AT 4000 MILES, WENT TO START AND VEHICLE WILL NOT DO ANYTHING. NO POWER. IT IS BEING TOWED TO DEALER AGAIN. PRETTY MUCH BOUGHT A LEMON AS IT LOOKS NOW."~4,000 mi, complaint #1684251
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle shuddered. The vehicle was taken to the dealer however, the mechanic could not duplicate the failure. The vehicle was then taken to Gilland Chev…"~42,000 mi, complaint #1803444
    • "The contact owns a 2020 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount o…"~50,000 mi, complaint #2048444
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while accelerating from a complete stop, the vehicle lunged forward. The contact stated that the failure recurred while driving at various speeds depressing the accelerator pedal, and while decelerati…"~75,450 mi, complaint #2073577
  3. #3

    engine stall or no start

    8 stranded, 13 unsafe

    21
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=7)

    • "THE ENGINE FAILED AT 5100 MILES AND IS CURRENTLY BEING REPAIRED BY THE DEALERSHIP. I REQUESTED A NEW CAR REPLACEMENT."~5,100 mi, complaint #1716980
    • "The contact's son owns a 2020 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle shut off without warning. The contact stated that the vehicle was restarted and resumed normal operation moments after the failure. The contact state…"~40,000 mi, complaint #2040232
  4. #4

    brake hydraulics

    20 unsafe

    20
    incidents

    Commonly reported, insufficient mileage data - n=14, median 33,000 mi, no reliable range below 25 reports.

    • "VEHICLE WAS PARKED. ENTERED VEHICLE AND TURNED ON VEHICLE USING INTERIOR START BUTTON. VEHICLE WAS PUT IN REVERSE AND WAS BAKING WHEN ALL BREAK PRESSURE DISAPPEARED AND VEHICLE WAS ROLLING BACKWARD AND CAME TO A STOP BEFORE STRIKING ANOTHER VEHICLE AND CHILD.…"~1,950 mi, complaint #1646458
    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT 52 MPH, THE BRAKE PEDAL WAS DEPRESSED BUT WAS VERY FIRM. THE PARK BRAKE WAS ACTIVATED BUT FAILED TO EFFECTIVELY STOP THE VEHICLE. THE VEHICLE WAS COASTED TO A PARKING LOT AND…"~7,020 mi, complaint #1640505
    • "MY 2020 GMC SIERRAS BRAKES FAILED ON MAY 22ND AND ECM AND NOW THE ENGINE AND TRANSMISSION ARE EXPERIENCING ISSUES BASED ON THE ONSTAR REPORT."~11,000 mi, complaint #1689953
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving 60 MPH, the service brake, check engine, and ABS warning lights were illuminated. The contact took the vehicle to an independent mechanic to be diagnosed and it was determined that the p…"~69,000 mi, complaint #1922762
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that the vehicle failed to start. The battery was replaced, and the failure was remedied. On another occasion, the contact stated that the brake percentage was low on the instrument panel and that the…"~102,000 mi, complaint #2029235
  5. #5

    steering electric assist

    17 unsafe

    17
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=9)

    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE WAS AT A STAND STILL IN A HOSPITAL PARKING LOT, WHEN THE STEERING WHEEL CEASED. THE CONTACT STATED THAT THE POWER STEERING ASSIST WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS NO…"~1,000 mi, complaint #1684180
    • "2020 GMC SIERRA STEERING ISSUES. LOSS OF COMMUNICATION BETWEEN MODULES. RESULTS IN LOCKED STEERING OR NO POWER STEERING ASSIST. HAPPENS RANDOMLY AT VEHICLE START UP. BEEN TO THE DEALER FOUR TIMES SO FAR. THE FIRST TWO WAS INFORMED THERE'S NOTHING WRONG WITH IT…"~3,500 mi, complaint #1676759
    • "IT WAS FINE AND WE DROVE TO OUR NEIGHBOR, PARKED ABOUT 15 MINS. WHEN WE STARTED THE TRUCK TO TURN BACK, THE STEERING WAS SUPER HEAVY, WITH 2 MESSAGES POP UP ON THE DASHBOARD: SERVICES ESC, AND SERVICE POWER STEERING DRIVE WITH CARE. TRIED SEVERAL TIMES TO RE-S…"~10,300 mi, complaint #1744671
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at various speeds, the steering wheel became stiff and difficult to steer to the left or the right. The power steering and check engine warning lights were illuminated. The vehicle…"~37,061 mi, complaint #2181166
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that upon start the vehicle, the vehicle lost power steering functionality. The messages “Service Power Steering”, “Power Steering Disabled” were displayed, and ESC warning light was illuminated. The…"~115,000 mi, complaint #2131244
  6. #6

    wiring harness

    2 stranded, 10 unsafe

    12
    incidents

    Commonly reported, insufficient mileage data - n=12, median 44,000 mi, no reliable range below 25 reports.

    • "The contact owned a 2020 GMC Sierra 1500. The contact stated that after the vehicle was purchased and while driving at an undisclosed speed, the check engine warning light illuminated. The dealer was contacted. However, the check engine light turned off, and t…"~32,000 mi, complaint #2155364
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle was stuck in gear. While driving there was an abnormal burning odor coming from the vehicle. The vehicle failed to start on several occasions. There were s…"~44,000 mi, complaint #1994056
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving on a main road at 40 MPH, the vehicle lost automotive power, causing the vehicle to shut off. There was no warning light illuminated. The vehicle was towed to a local dealer where t…"~80,000 mi, complaint #2103537
  7. #7

    other

    8 unsafe, 3 annoyance

    11
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "I purchased the 2020 Sierra 1500 because the label on the truck frame states that it can tow 9300lbs. Subsequently, in April 2021, I purchased a 34' Travel Trailer with a max capacity of 8995lbs. In August, I received a notice from GMC that they overstated th…"complaint #1767975
    • "The rear window on this vehicle is leaking water and has been for some time. It has become quite bad and is causing an odor and discoloration in the carpet. I could not find the cause of the problem until recently with the plastic cracking more. The vehicle ha…"complaint #1930272
    • "The rear window was leaking a substantial amount of water soaking the back seat. Had the service bulletin done, which did not work. Then under further inspection found cracks in the rear power window track. Dealer told me GM would not cover replacement beca…"complaint #1951309
    • "Rear Window Leaks due to failed sealing at the factory. If not fixed will ruin interior components and possibly rust. Yes No No "complaint #1967800
    • "The rear sliding window leaks water inside the cab every time it rains. With water getting into the cab the issue of mold has begun and that could be a serious factor to any children or adults that ride inside the cab of the truck. There is also rust issues th…"complaint #1988185
  8. #8

    backup camera

    6 unsafe, 4 annoyance

    10
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=5)

    • "THE BACKUP CAMERA IS ENTIRELY TOO BRIGHT AT NIGHT. IT IS NEARLY IMPOSSIBLE TO SEE THE MIRRORS DUE TO THE BRIGHTNESS"~1,000 mi, complaint #1639414
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while reversing the vehicle, the rearview camera image failed to display as needed, and the radio was inoperable. The vehicle was taken to the dealer, but the cause of the failure could not be determi…"~3,500 mi, complaint #2047626
  9. #9

    suspension arms and bushings

    10 unsafe

    10
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving out of the driveway, the front passenger’s side wheel separated from the vehicle. The vehicle was towed to the dealer and the contact was informed that the upper control arm ball joint h…"~41,000 mi, complaint #1914698
  10. #10

    control module

    1 stranded, 6 unsafe, 2 annoyance

    9
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that on several occasions while the vehicle was started, the check engine, brake system, and another unknown warning light illuminated. Additionally, the messages brake system failure, steering wheel…"~65,000 mi, complaint #2127327
  11. #11

    glass and windshield

    8 unsafe, 1 annoyance

    9
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=2)

    • "WHILE DRIVING ON A STATE HIGHWAY, I HEARD A "POP" SOUND, I SAW NOTHING CONTACT THE VEHICLE, BUT I THEN NOTICED THE WINDSHIELD WAS CRACKED. THE WINDSHIELD CRACKED FOR NO APPARENT REASON.. "~27,540 mi, complaint #1727210
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while detailing the rear interior of the vehicle, the contact discovered water surrounding the rear windshield casing and the water was leaking into the rear seating. Additionally, the rear carpet was…"~31,000 mi, complaint #1967477
  12. #12

    stability and traction control

    1 stranded, 8 unsafe

    9
    incidents

    Commonly reported, insufficient mileage data - n=22, median 3,000 mi, no reliable range below 25 reports.

    • "HIGHWAY DRIVING ENGINE LIGHT STARTED FLASHING, RECEIVED CODES ON SERVICE ESC AND SERVICE PARKING BRAKE. TRUCK SEEMED TO LOOSE POWER TRANSMISSION STARTED SHIFTING VERY HARD, CRUSE DISENGAGED,LANE KEEP ASSIST STOPPED WORKING , BRAKES AND STEERING SEEMED TO ACT D…"~1,950 mi, complaint #1669075
    • "PARKED TRUCK FOR ONE HOUR, ENGINE OFF. CAME BACK AND UPON STARTUP, RECEIVED MULTIPLE ERRORS THAT POWER STEERING AND ESC REQUIRED DEALER ATTENTION. BRAKE PEDAL WOULD DEPRESS TO FLOOR. GMC SIERRA 1500 ELEVATION TRIM"~3,000 mi, complaint #1688382
    • "EVERYTHING WAS FINE FOR ABOUT 6 MONTHS AFTER HAVING PURCHASED VEHICLE AS NEW. THEN I GOT WARNING LIGHTS ASKING ME TO BOTH SERVICE THE PARKING BREAK AND SERVICE ESC WITH A WARNING THAT DRIVING WOULD BE COMPROMISED JUST OVER 60MPH. I NOTIFIED DEALER WHO SAYS THE…"~5,000 mi, complaint #1694854
    • "AFTER HAVING ALL SORTS OF WARNINGS OVER TIME LIKE "SERVICE ESC," "SERVICE PARKING BRAKE," AND MORE, I NOW SEE "BRAKE SYSTEM FAILURE: 62 MPH TOP SPEED" FLASH ACROSS MY DASH. I AM READING AND HEARING THAT THIS IS A VERY DANGEROUS PROBLEM. NEW TRUCK. BRAND NEW. H…"~6,400 mi, complaint #1712570
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving 40 MPH, the vehicle failed to properly respond. There were no warning lights illuminated; however, the message ESC was displayed. The contact stated that the brakes, steering, and a mess…"~125,000 mi, complaint #2085317
  13. #13

    engine oil consumption

    2 stranded, 6 unsafe

    8
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=2)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving 70 MPH, the low oil pressure warning light illuminated. The contact pulled over to the side of the road and noticed that the oil level was abnormally low. The contact added oil to the ve…"~96,000 mi, complaint #2077164
  14. #14

    airbag system

    7 unsafe

    7
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=5)

    • "KEEP GETTING "SERVICE SAFETY RESTRAINT SYSTEM " ALERTS. VEHICLE ONLY HAS 550 MILES. ALERTS ARE INTERMITENT WHEN DRIVING. CONTACTED THE DEALER AND WAS ADVISED THAT UNLESS IT REMAINS ON THEY COULD NOT TRACE THE ISSUE."~550 mi, complaint #1704752
    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 35 MPH THE DRIVER LOST CONTROL OF THE VEHICLE AND DROVE OFF THE ROAD AND DOWN AN EMBANKMENT BEFORE CRASHING TO THE GROUND. DURING THE CRASH THE VEHICLE SUSTAINED S…"~10,000 mi, complaint #1716150
    • "The contact owned a 2020 GMC Sierra 1500. The contact stated that while he was stopped in traffic, he was rear-ended, which caused him to crash into the vehicle in front of him. The contact stated that smoke was seen coming from the air bag; however, the air b…"~64,000 mi, complaint #1892793
  15. #15

    fuel pump

    3 stranded, 2 unsafe, 2 broken

    7
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "The vehicle shut off while driving. It turns over fine but will not crank. Later cranks but again will shut off and not start. This could get me killed on the interstate. It is pulling trouble code P129F fuel pump power control module. This is a 2020 GMC Sierr…"complaint #1843206
    • "The fuel pump module failed according to the dealer at 34000 miles . Car stop while driving. Cranks but no start. After resting it for hours I was able to start. Drive couple of miles about 39000 miles it stops middle of driving and couldn’t start anymore but…"complaint #1859631
    • "My vehicle suddenly did not want to start without any warning. I drove my truck and everything was good until I turned it on with the remote and not even a minute after it shut off. I tried turning it back on and it only cranked but would not start. I had a me…"complaint #1914345
    • "13540028 Fuel Pump Power Control Module Part failed leaving me stranded and had to get a tow. When the failure occurred, vehicle would not crank and there was no forewarning. It worked and then it didn't. The part is on notional backorder and there seems to…"complaint #1977420
    • "GDI fuel pump went bad needed replacement. "complaint #2051436
  16. #16

    trunk or liftgate

    6 unsafe, 1 annoyance

    7
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "My back window leaks and gm has said that the warranty is over by years not miles it is not covered"complaint #1884725
    • "My rear window leaks there is a bulletin on it Call GM says it is not responsible for the repair because it is over on the years but not the mileage it’s clear they know about the problem it’s in many pickups that gm manufacture here is the bulletin file:///va…"complaint #1884726
    • "The back window leaks, I brought it in they told me it wasn't warranty so I paid to have it fixed. Still leaks."complaint #1964083
    • "Tailgate releases on its own while parked, without the use of the switch. Tailgate released on its own with my trailer attached while parked on many occasions. The result of the Tailgate releasing caused damage to the upper section of the Tailgate, the "kicker…"complaint #2045421
    • "Tailgate opened on highway with cargo in bed. Also tailgate opens randomly when parked. This has happened many times, creating very dangerous and unexpected situations Numerous contacts to the manufacturer have been unsuccessful in getting the hazard placed o…"complaint #2066964
  17. #17

    engine cooling

    6 unsafe

    6
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Engine light came on while driving / aligned to transmission temp sensor error and brake sensor GM Maintenance was able to diagnosis that the Temperature Loop Coolant Pump had failed and needed to be replaced. "complaint #2094135
    • "Engine overheating at 50,000 miles. Temp would intermittently jump up to 230plus degrees while driving. Radiator replaced per dealership diagnosis. Issue still happening. "complaint #2106089
    • "Check engine light came on. Cooling fan for engine running none stop. Reduce power mode from engine. Took to dealer, said it’s the coolant control valve. Dealer said the part is on back order and don’t know when they will get it in. Looked up the issues a…"complaint #2109797
    • "The engine coolant control valve on my 2020 GMC Sierra 1500 with the LM2 Duramax diesel failed. The failed part is still in my truck, which remains at the dealership awaiting replacement. The repair is delayed due to the part being on nationwide backorder, fur…"complaint #2132890
    • "Coolant control valve and engine cooling fan "complaint #2145893
  18. #18

    abs module

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=4)

    • "THE ABS SYSTEM FAILED WHILE DRIVING DOWN THE ROAD CAUSING THE BRAKES TO LOCK UP AND CAUSED THE TRUCK TO SPIN OUT OF CONTROL NEARLY CRASHING INTO ANOTHER VEHICLE AND JUMPING OVER THE CENTER DIVIDE INTO ONCOMING TRAFFIC."~4,395 mi, complaint #1651574
  19. #19

    battery and charging

    3 stranded, 2 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=6)

    • "BATTERY WAS DEAD IN THE GARAGE. CALLED ROAD SIDE ASSISTANCE WHO JUMP-STARTED CAR. CAR WOULD NOT GO INTO GEAR. WE ROLLED IT OUT INTO DRIVEWAY WHERE IT SAT FOR 24 HOURS. WHEN IT WAS LOADED FOR TRAVEL TO DEALERSHIP, IT CRANKED AND WAS DRIVEN UP ON WRECKER TR…"~5,100 mi, complaint #1680852
    • "ON TWO SEPARATE OCCASIONS, THE TRUCK HAS BEEN DEAD WHEN ATTEMPTING TO CRANK. THERE WERE NO LIGHTS OR DEVICES LEFT ON AFTER THE PREVIOUS TIME THE TRUCK HAD BEEN USED. SOMETHING IS DRAWING POWER FROM THE BATTERY CAUSING IT TO BE DEAD. AFTER RECHARGING THE BAT…"~15,000 mi, complaint #1714468
  20. #20

    emissions aftertreatment

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "DEF Emissions warning and Engine Emissions warning lights suddenly appeared. DEF Emissions warning went on and off multiple times in the two days before bringing to a GMC service location. Informed that the DEF Tank heater failed, a known problem, but that the…"complaint #2037249
    • "Engine light would come on for a few days and than turn itself off. this occurred for about 8/9 months; however, instructed by the GM Maintenance department that if the vehicle came in and the light turned off before they got to it i would be charged for the…"complaint #2094155
    • "Engine Light came on, performance rough at various speeds / conditions, and smelled like burning and strong urea smell. GM Maintenance identified a failed DEF injector / replaced"complaint #2094162
    • "1. On 05/9/25, the exhaust emissions system malfunctioned, triggering diagnostic trouble code P2C7A (exhaust emissions system failure). This repair, the seventh attempt since June 2024, addressed the same recurring emissions issue previously involving replacem…"complaint #2098431
    • "1. The vehicle’s emissions system is malfunctioning, specifically the ECM (Engine Control Module) related to the exhaust emissions system. The diagnostic trouble code is P2C7A, indicating the system is not performing as expected. Key components such as the NOx…"complaint #2147424
  21. #21

    power steering hydraulic

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=5)

    • "ON DECEMBER 14, 2020 MY SIERRA WITH 2339 MILES DISPLAYED, AT STARTUP, THE POWER STEERING WAS OUT, TO DRIVE WITH CARE. ALSO DISPLAYED SERVICE ESC AND TRACTION CONTROL FAILURES. I DROVE WITH MUCH DIFFICULTY, WITHOUT POWER STEERING, TEN MILES TO THE NEAREST GMC D…"~2,339 mi, complaint #1719506
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving in the snow, the tire pressure and power steering warning lights illuminated. The vehicle was not diagnosed or repaired. The vehicle was taken to a dealer where it was confirmed tha…"~140,000 mi, complaint #1800242
  22. #22

    torque converter

    5 unsafe

    5
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=2)

    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT UPON EXITING THE VEHICLE, HE NOTICED THAT THE VEHICLE WAS LEAKING AN UNKNOWN FLUID. THERE WAS NO WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO SIMPSON BUICK GMC OF BUENA PARK ([REDACTED…"~11,000 mi, complaint #1743882
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that upon taking the vehicle to the dealer for a transmission fluid flush and refill, the contact was informed that the transmission was inoperable, and the vehicle could not be driven to the residenc…"~85,165 mi, complaint #2218773
  23. #23

    infotainment head unit

    2 unsafe, 1 broken, 1 annoyance

    4
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=4)

    • "NAVIGATION STATES TO TURN RIGHT WHEN IT SHOULD BE LEFT OR VICE VERSA. THIS WAS A PROBLEM ON THE 2016-2017 MODELS ALSO. *TR"~4,000 mi, complaint #1671548
    • "DANGEROUS VISIBILITY HAZARD WHEN BACKING UP VEHICLE AT NIGHT. INFOTAINMENT SCREEN SWITCHES TO "FULL BRIGHTNESS" WHEN BACKUP CAMERA IS ACTIVATED, RESULTING IN BLINDING LIGHT TO DRIVER. DRIVER CAN NOT BACKUP SAFELY WITHOUT PHYSICALLY COVERING THE SCREEN TO REGA…"~20,000 mi, complaint #1729145
  24. #24

    software or update

    2 unsafe, 2 annoyance

    4
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=4)

    • "MY TRUCK TUESDAY MARCH 16TH HAD ME UPDATE SOFTWARE AS SOON AS I GOT TO WORK, AFTER IT WAS DONE I GOT OUT OF MY TRUCK AND IT WOULD NOT LOCK WITH PUSH BUTTON OR FOB. WHEN I GOT INTO MY TRUCK TO GO HOME 10HRS LATER IT MADE A BUNCH OF CLICKING NOISES AND AFTER A M…"~20,500 mi, complaint #1734754
  25. #25

    acceleration loss or hesitation

    2 unsafe, 1 annoyance

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=4)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle jerked while accelerating and while coming to a stop. The check engine warning light was illuminated. The vehicle was taken to the dealer, but n…"~65,000 mi, complaint #2093852
  26. #26

    adas lane keeping

    3 unsafe

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "ADDITIONAL INFORMATION RE ODI 116346689: Tried to report to GM using [REDACTED PHONE] provided by you. Agent would not accept ANY information that I tried to provide, including year/make /model and would not confirm or deny that the issue was known by them. Ag…"complaint #2057830
    • "1. Lane Keeping Assistantance: The green vehicle indicator on the dashboard will disappear and stay off while driving. When it is off, it is unsafe. 2. Parking Collision Warning: The front and back sensors will disappear and become nonfunctional while drivin…"complaint #2109353
  27. #27

    exhaust system

    2 unsafe, 1 annoyance

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Repeated issues with exhaust and emissions components. "complaint #1762869
    • "A VERY STRONG "AMMONIA" ODOR COMES INTO THE CABIN. THIS HAPPENS WHEN THE DEF FLUID IS GOING INTO THE EXHAUST SYSTEM FOR THE REGEN PROCESS. THE ODOR MAKES PEOPLE INSIDE NAUSEOUS AND DIZZY. MUST OPEN WIDOWS OR STOP AND GET OUT OF THE VEHICLE. OUR GMC DEALER CAN…"complaint #1806030
    • "Tick sound coming from underneath. Also fumes smell. Dealership found it to be the exhaust system. Said the muffler valve is bad. Quoted me $2000 for repair. Never heard of a exhaust system failure in only 5 years. Very unsatisfied with this."complaint #2143572
  28. #28

    timing belt or chain

    3 unsafe

    3
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "timing chain failure, timing chain components are available for inspection. Costly premature repair/failure. Could leave occupants stranded in unsafe environment which could lead to death. The vehicle has been diagnosed by the dealership and OEM manufacturer h…"complaint #1945859
    • "At 125,000 miles, the CEL came on and the code is P0016, which is for the timing chain has stretched and jumped a tooth. The engine was new in 2019 and in 2021, they redesigned the timing chains due to early failure. The oil pump belt is listed for inspectio…"complaint #2064385
    • "Engine timing chains failed at 71,000 miles requiring a $9,700 repair. Warranty covers 5 yr/ 100k miles and was not fully covered by GM since the vehicle was 9 months beyond 5 years, yet still well within the 100k miles. Issue was diagnosed via P0016-00 being…"complaint #2133404
  29. #29

    adas adaptive cruise

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "THE VEHICLE HAS MADE "PANIC STOPS" AT HIGHWAY SPEEDS 5 TIMES WHEN USING ADAPTIVE CRUISE CONTROL WITH NO INPUT FROM DRIVER OR SURROUNDING ENVIRONMENT I.E.. CLEAR ROAD, NO TRAFFIC, SUN OR NO SUN."~16,000 mi, complaint #1742795
  30. #30

    adas collision warning

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "On two separate occasions, while traveling at highway speeds with the adaptive cruise control system on, my truck randomly started braking hard as if it was sensing a vehicle or obstacle in front of me but my lane was completely clear. The most recent time, I…"complaint #2029255
    • "I was driving about 45 mph when the vehicle started to brake on its own. Message center said "Brake Failure max speed 62 mph". I had to move the vehicle, so I continued forward. It was still trying to self-brake, i decided to stop and turn ignition off so comp…"complaint #2092399
  31. #31

    driveshaft axle cv

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "I was driving my 2020 GMC Sierra AT4 at about 15mph on a [REDACTED ADDRESS] slowing for a traffic light when my vehicle started to shake violently...at first thinking it was a flat, but the shaking was much different. As I was slowing in anticipation of the l…"complaint #1766487
    • "There has been a recall on the 2020 sierra 1500 for the driveshaft which causes shuddering and vibration which my vehicle is exibiting but my vin is not on the recall list"complaint #2032129
  32. #32

    evap system

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Diesel exhaust fluid heater short circuits due to poor design. This issue occurs multiple times, including after being repaired. The failure limits the trucks capabilities until it is entirely unusable. "complaint #1871146
    • "Vehicle was going in for warranty recall; however, i requested they look at the DEF system as my DEF gauge would bounce between full and empty; along with, alert me of going into LIMP mode. GM Maintenance updated the recall and noticed that the DEF tank sens…"complaint #2094150
  33. #33

    fluid leak unspecified

    1 stranded, 1 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the parking brake was independently activated. In addition, the contact stated that the vehicle had an oil leak from the oil pan. The contact stated that the oil…"~10,000 mi, complaint #2071717
  34. #34

    fuel tank and lines

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at 65 MPH, the DEF tank failed. The vehicle went into three phases of LIMP Mode and the vehicle unexpectedly decelerated while driving. The DEF system service message was displayed.…"~70,000 mi, complaint #2189255
    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while starting the vehicle, the engine hesitated while turning over. The vehicle started with the check engine warning light illuminated, and the DEF (Diesel Exhaust Fluid) sensor light was illum…"~121,000 mi, complaint #2187698
  35. #35

    hv system fault reduced power

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=2)

    • "CAR WAS IDLING AND PARKED. WARNING CODE SHOWED UP ON DASHBOARD ESC, ELECTRONIC STABILITY CONTROL, REDUCED ENGINE POWER. VEHICLE THEN DISPLAYED TRANSMISSION DISRUPTION, WARNING LIGHT DISPLAYED AS WELL. I WAS ABLE TO DRIVE IT TO THE DEALERSHIP BUT THE PERFORMANC…"~5,000 mi, complaint #1716555
  36. #36

    steering rack mechanical

    1 unsafe, 1 annoyance

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "The right side started clicking out of no where when I turn the steering wheel"complaint #1925996
    • "Was driving down the freeway around 65 miles an hour attempted to pass a truck when the steering started wobbling the ABS that EMS and the breaking system came on with the check engine light almost had no control and barely avoided having an accident the only…"complaint #2123822
  37. #37

    tire failure

    2 unsafe

    2
    incidents

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500 EQUIPPED WITH BRIDGESTONE TIRES, TIRE LINE: ALENZA A/S 02, TIRES SIZE: 275/50/R22, DOT NUMBER: UNKNOWN. THE CONTACT STATED THAT THE TIRES FAILED TO HOLD THE TIRE PRESSURE. THE VEHICLE WAS TAKEN TO SCENIC CHEVROLET BU…"~2,976 mi, complaint #1727961
  38. #38

    adas blind spot

    1 annoyance

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED WHILE DRIVING, THE SIDE VIEW MIRROR'S BLIND SPOT ALERTS ON BOTH SIDES ENGAGED WITH NO VEHICLE NEARBY. THE VEHICLE WAS TAKEN TO TURNER BUICK GMC ([REDACTED ADDRESS], NEW HOLLAND, PA 17557) WHERE TH…"complaint #1728153
  39. #39

    brake booster

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Two times while on the freeway the service parking brake and engine lights came on and starting braking. Could not drive over 20 mile an hour. Both times taking to dealer the lights where not on and they could not find anything wrong. I even have video of it…"complaint #1770535
  40. #40

    brake pads and rotors

    1 annoyance

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Brakes have been squealing since 4000 mile mark. Dealer states it’s normal. "complaint #1778764
  41. #41

    differential

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Has happened three times. 1st and 2nd time driving down road towing trailer, rear wheels locked up for 12-15’ while driving 50-55mph. I had thought it was my trailer axel. Happened twice within 6 miles. 3rd time was 1 month later. Rear Wheels locked up d…"complaint #1988659
  42. #42

    engine mounts

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while the vehicle was parked and being driven, the vehicle was shaking violently. There were no warning lights illuminated. The contact stated that the failure was related to Technical Service Bu…"~100,000 mi, complaint #2029558
  43. #43

    horn

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving 60 MPH, the horn failed to function as intended. There were no warning lights illuminated. The contact stated that on a separate occasion, the right lane sensor stopped working as i…"~68,000 mi, complaint #2096950
  44. #44

    instrument cluster

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "Odometer Fraud. The contact attempted to purchase a 2020 GMC Sierra 1500. The contact discovered a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the mileage was 75,000. At the time of registration, the Carfax Report indicated th…"~175,000 mi, complaint #2186676
  45. #45

    key fob and immobilizer

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE PUSH START BUTTON AND KEY FOB FAILED TO START THE VEHICLE ON FIRST ATTEMPT. THE CONTACT STATED THAT THE VEHICLE STARTED AFTER SEVERALS ATTEMPTED. THE CONTACT STATED THE FAILURE OC…"complaint #1707860
  46. #46

    lighting exterior

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "WHEN MAKING RIGHT TURNS IN THE DARK THE HEADLIGHTS DO NOT CAST LIGHT TO THE RIGHT SO YOU CAN SEE WHERE YOU ARE TURNING. THIS IS ESPECIALLY A PROBLEM IN THE RURAL WITHOUT STREETLIGHTS IT IS TOTALLY BLACK FROM THE DRIVERS SEAT LOOKING OVER THE RIGHT SIDE OF THE…"~1,500 mi, complaint #1628932
  47. #47

    power windows and locks

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "My doors will no longer lock or unlock, using the key fob or the lock/unlock buttons in the vehicle. This is a widely known issue for GMC Trucks, once you search for it. At around 50K Miles, the door actuators just quit working. So, if I have kids in my tru…"complaint #2119876
  48. #48

    starter

    1 stranded

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "BRAND NEW TRUCK PURCHASED IN MAY 2020. VEHICLE WOULD NOT START ON 7/2/2020 AND A NEW BATTERY WAS PLACED IN THE VEHICLE. THE TRUCK WOULD NOT START AGAIN ON 7/17/2020 UNKNOWN REASONS..."~3,500 mi, complaint #1678112
  49. #49

    steering column

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=3)

    • "WHEN STATIONARY AND PREPARING TO START VEHICLE INTERMITTENTLY SEE "SERVICE STEERING COLUMN LOCK" MESSAGE APPEARS AND DISAPPEAR ONCE VEHICLE IS STARTED. THIS WAS PREVIOUSLY SUPPOSED TO BE ADDRESSED WITH SERVICE BULLETIN 20-NA-21 HOWEVER BEING TOLD BY SERVICE D…"~8,800 mi, complaint #1729433
  50. #50

    throttle and pedal

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "I investigated and Unintended Acceleration crash that occurred on 8-9-2021. The vehicle had just left a body shop where it had repairs to the left front of the vehicle near the ECM. The driver reported the vehicle would not slow down. He face timed a witness a…"complaint #1819572
  51. #51

    tpms

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=0)

    • "Brake pad monitoring system alert came on driver information center warning screen. Brought to local dealer who told me I needed new brake pads. There is a current safety bulletin on the NHTSA.GOV website for the 2019 model year GMC Sierra, as well as the 2019…"complaint #1840118
  52. #52

    unknown

    1 annoyance

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "[XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR"~9,000 mi, complaint #1718438
  53. #53

    wiper and washer

    1 unsafe

    1
    incident

    Mileage: suppressed (fewer than 10 mileage-bearing reports; n=1)

    • "WIPERS FROZE TO WINDSHIELD WHILE DRIVING WITH DEFROSTER ON MAX. DESIGN OF THE WINDSHIELD AND DASH MEANS WIPERS SIT LOWER THAN WHERE THE DASH AND WINDSHIELD MEET, AND NO WARM AIR FROM THE DEFROSTER CAN GET TO THE WINDSHIELD WHERE THE WIPERS SIT. THERE IS NO I…"~5,400 mi, complaint #1723867

NHTSA investigations

Search NHTSA's own recall and complaint database for GMC SIERRA 1500 directly.