GMC Sierra Complaints

15,732 consumer complaints on file.

#11716202February 6, 2026
POWER TRAIN
catastrophic engine failure to due connecting rod bearings spun on the crankshaft damaging the crank and sending bearing material throughout the oil galleries
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716229February 6, 2026
ENGINE, ELECTRICAL SYSTEM, POWER TRAIN
To start off my truck has been to the dealership multiple time for the camera. After third time in the shop they fixed that issue. Then the infotainment started acting up after about 4 times in the shop it was fixed. They gave me the prescribed fix for the engine recall in november. Engine passed the test. Then 3 weeks ago the engine siezed up from the crank and bearings on the interstate doing 70 pulling a trailer in traffic. Leaveing me and my dad in the middle of the interstate. I had to have it towed 2 hours to my house. After the prescribed engine fix. They replaced the motor in 3 days. Great right? No they did not test drive long enough. Or they would have felt the shudder that developed after the new engine went in. It is now about to go back to the shop. Because of the shudder at low rpm and im haveing electrical issues again as well . My remote start also stopped working after the engine replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716277February 6, 2026
ENGINE
On 5 Feb 2026 I was starting my 4-hour drive back home. 15 minutes into my drive my truck lost power, several lights and the engine light came on. Truck was sputtering and making harsh engine noises and shut off on me. I was forced to exit Loop 2 (a major highway). Once I was able to restate the truck I went straight to the dealership. This truck had the recall done 15 Oct 2025. However, this issues still occurred. The motor gave out. Truck is 83K in mileage. well under 100K. Cost estimate is $6.5K. The technician informed me that a lifter collapsed in cylinder 5. This is clearly still part of the GMC recall issue for the 6.2L engines. What is my next step in this process. If I knew there was a major issue with these Trucks, I probably would not have purchased it. All maintenance has been done with same dealership to keep all service records excess able.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716354February 6, 2026
ENGINE
I purchased my 2020 gmc sierra 1500 6.2L in September 2024 with 80,000 miles. 9 months later the lifters gave out. Had them replaced and 6 months later, the lifters again were bad and was knocking. They are now replacing the lifters and cam. I am so disappointed that this is happening. I hear that the 2019 and 2020 was not included in this recall! Why not!! If it’s still doing the same thing and it is the same engine, why isn’t my truck in this recall? I would like to know why? If it is doing the same thing as the recall, shouldn’t it be covered by this recall? Best, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715791February 5, 2026
ENGINE
On or about Tuesday, February 3, 2026 at 12:20 CST, at the Chevrolet Dealership in Libertyville, IL; I presented my 2023 GMC Sierra to “Manny” at said dealership due to the vehicle INSTRUCTING ME TO DO SO because of DTC codes displayed indicating a failed DEF tank. I was told a technician would be able to diagnose the vehicle that afternoon. MakeModelYearVIN GMCSierra2023 [XXX] Day 1: came and went with no contact from the service department as promised. Day 2: Wednesday, February 4 came with – again – no follow-up from the dealer. When I CALLED I was told there were “no notes in the service order” and “the tech has gone home.” Day 3: Thursday morning “Manny” called to tell me nothing was done and nothing could be done. I was told to “call GM” and complain about my problem. This is how GM treats its customers. This is how GM treats its REPEAT customers. This is how GM treats its customers who BUY THEIR EXTENDED WARRANTIES. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715880February 5, 2026
VISIBILITY/WIPER
While using the rear defrost my daughter smelled burning. Moments after the smell the rear window exploded. This is a sliding three part window and it shattered on the passenger side. My daughter was hit by the exploding glass.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11715890February 5, 2026
ENGINE
"Vehicle exhibits a severe RPM flutter and rhythmic harmonic vibration at idle. These symptoms are consistent with manufacturing defects in the connecting rod and crankshaft currently under NHTSA RQ26001 and EA25-007 investigations for the GM 6.2L L87 engine. The defect presents a substantial risk of sudden engine seizure and loss of propulsion while driving. Vehicle is currently out of service at Jim Curley GMC for its first repair attempt. The dealer has stated repairs will not begin for several days."
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716003February 5, 2026
ENGINE
Catastrophic engine failure. Engine failed while driving and lost all oil pressure. Nearly cause accident
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715737February 5, 2026
POWER TRAIN, ENGINE
I was driving and the engine abruptly stalled. The truck self-shifted to Neutral. Once stopped, I shifted to Park to attempt a restart. It would not crank. I was on a 2-lane road so I did not have a shoulder. Once I realized it would not restart I tried to shift to Neutral so I could push it to a subdivision road about 50 yards away only to find out my transmission has no ability to shift to Neutral (the dealer confirmed this later). So I was stuck on the road for hours just over the crest of a hill with people coming up on me and my family at 50mph. It was a windy 10 degrees so we could not wait on the side of the road where we would have been safer. This is how people get killed; being stopped where people can't see you and do not expect you to be stopped. Why can I not get the truck off the road? If this happened on an 8-lane highway how would I get to a shoulder, even after traffic had stopped behind me? On top of all that, the problem with the truck ended up being an engine bearing failure (per the dealership service dept) that is a known problem with this engine and truck build date. General Motors needs to proactively diagnose and get these engines replaced before someone gets hurt. There is a TSB issued for the bearing issue but when I asked my dealer about it a month ago, before the failure, they acted like they knew nothing about it and told me to bring it in if I hear noises. If they had offered to check the crankshaft endplay when I asked about it ( as the TSB suggests), I may not have gotten stranded and my family's safety put at risk. There were no warning lamps, and no strange noises before the engine seized. My fuel economy had decreased by about 20% in the last month but that may be from cold weather operating conditions. I have a separate electrical issue that I've been chasing down and I assumed this stall condition was related to that. But the dealer confirmed this was a bearing failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715464February 4, 2026
ENGINE
Loss of power code p0016 now truck won't start
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715495February 4, 2026
UNKNOWN OR OTHER
While sitting at a stop sign heard a loud bang and truck lunged forward as if we were rear ended . Actually thought we were . Drove about 20 miles and transmission went out . Even though i had foot on brake truck still went forward . Had to have transmission replaced at $6421.58 in Florida while on vacation . Have researched on internet and found several cases exact same thing . Even shop that did work said GM had a problem but was doing nothing as of yet .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715507February 4, 2026
ENGINE, POWER TRAIN
check engine light and traction control light on. vehicle undriveable. took to dealer code P0304 lifters need to be replaced
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715584February 4, 2026
POWER TRAIN
1) Component/System & Availability for Inspection Transmission control system. When shifting into reverse, the CHECK ENGINE lamp flashed and a “Transmission Service” warning appeared. Dealer retrieved DTC P07B4 and documented: “DIAGNOSIS OF ENGINE/CHECK ENGINE LAMP - CUSTOMER STATES WHEN SHIFTING IN REVERSE CHECK ENGINE LIGHT CAME ON FLASHING AND WARNING MESSAGE ON FOR TRANSMISSION SERVICE. CHECK AND ADVISE. NOTE: CUSTOMER DOES NOT FEEL ANY ISSUE WHEN DRIVING. SAVI CODE P07B4.” The component remains installed and is available for inspection upon request. 2) Safety Risk A transmission control malfunction can lead to unpredictable shifting or loss of propulsion, posing risk during reversing, crossing traffic, or merging. 3) Reproduced/Confirmed by Dealer? Yes. Dealer confirmed the condition and stored code P07B4 consistent with my report. 4) Inspected by Others? Inspected by an authorized GM dealer. No inspections by police/insurance/others. 5) Warning Lamps/Messages & Onset Yes. The CHECK ENGINE lamp began flashing immediately when shifting into reverse, with a “Transmission Service” message. I did not feel drivability issues at that moment. Addendum — Link to GM Safety Recall N242454440 GM Safety Recall N242454440 addresses excess wear of a transmission control valve that degrades hydraulic pressure, causes harsh shifting, and—rarely—momentary rear‑wheel lock‑up during a downshift. The remedy is a TCM software update that monitors valve performance and detects wear ~10,000 miles before a potential event; if detected, the transmission is limited to 5th gear and warning messages appear. My transmission warnings and DTC indicate a transmission control/pressure concern consistent with the recall subject. I request that NHTSA consider this complaint related to N242454440 and ensure appropriate recall remedy and coverage. (GM service bulletin/stop‑delivery and NHTSA filings corroborate these details.)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715606February 4, 2026
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
I was driving on an overpass and suddenly loss propulsion in my vehicle. My vehicle stopped all of a sudden and while driving, leaving me stranded in the middle of the roadway blocking traffic. Numerous motorists stopped to give a hand but the vehicle would not switch gears from PARK, to neutral to even give me a hand moving the vehicle out of the roadway to the side/shoulder. Due to this issue, authorities were dispatched to my location to conduct traffic control and subsequently called in aide of a tow truck to safely move my vehicle to a better location. I used OnStar in my vehicle and also spoke with a representative who notated the incident and I was advised that a tow truck would take approximately 90 mins to 2 hours to reach me. In this instance, that was too long of a wait for events going wrong with the vehicle itself and was subsequently transferred from the roadway to a GMC dealership, namely Group 1 South on the Gulf Freeway. They are handling my repairs and have diagnosed that the engine needs to be completely replaced and are in the process of repairs. If any information is needed regarding status or repairs, please contact the dealership directly as I do not have any physical or written information on the status of my vehicle. Attached is the towing receipt.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715607February 4, 2026
ENGINE
Burns excessive amounts of oil between oil changes.All cars were covered under the g.M recall mine fell, one month behind.But this motor is the exact motor that has been recalled to put in a heavier weight oil.Please expand the recall.So my truck can go in.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715720February 4, 2026
ENGINE
While pulling a small trailer to go hunting, the engine just lost all power while merging onto the freeway. I had to pull over to the shoulder in high speed traffic because the truck had no power and had an odd clanking sound. When I took it to the dealer for repair, they stated that the lifter failed and also damaged the cam. This required a full engine rebuild. When the dealer went to test drive the truck with the new parts, ANOTHER lifter failed and also affected the cam again which required another rebuild.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715193February 3, 2026
POWER TRAIN
I was driving my 2022 gmc Sierra with the 6.2 engine 10 speed transmission and I was at at a red light, the light turned green and I went to go and I could feel my rear wheels lock up and then it released went into limp mode was not shifting gears correctly and I had no reverse
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715267February 3, 2026
AIR BAGS
The contact owned a 2016 GMC Sierra 1500. The contact stated that while driving approximately 35 MPH, the vehicle crashed into a deer, causing significant damage to the front end. During the crash, no airbags deployed. The cause of the air bag's failure to deploy was not determined. The vehicle was repaired at the local collision center. Recently, while driving approximately 50 MPH, the driver pressed the brakes to decelerate before crashing into a deer. During the crash, the vehicle sustained minor damage to the front end, but all the air bags in the vehicle deployed, including the driver steering wheel air bag, the front passenger side air bag, the driver and passenger side curtain airbags and seat belt pretensioners, and the passenger side seat air bag. The driver's side seat airbag did not deploy. The contact suffered adverse effects of COPD due to the air bag powder during the deployment. No medical treatment was needed. The cause of the failure was not determined. The manufacturer and local dealer were not contacted. The contact indicated that due to the minor damage to the vehicle during the crash, the air bag should not have deployed. The vehicle was towed to a collision center and was determined to be destroyed. The failure mileage was unknown.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11715272February 3, 2026
ENGINE
I purchased my vehicle in June 2025. In January of 2026 the vehicle would sometimes shut down at red lights, requiring me to restart. No engine codes would pop up. On Jan. 16th, 2026, I exited my vehicle and heard a “cow bell clunking” coming from the engine area. I scheduled a service, and I was informed that the issue was part of the GM recall for 6.2L engines. This concerned me, because my vehicle had already had the “remedy” for the recall (changing engine oil type) prior to me purchasing it Certified Pre-Owned, and the engine still failed. The dealer I brought the truck to did a full engine (and appropriate parts) replacement as part of the open recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715295February 3, 2026
ENGINE
80,000 Miles, complete engine break down. 12,000 to repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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