2024 GMC Sierra 1500 problems

Filed Nov 4, 2026 · Engine · WY

**Subject: Complete Engine Seizure After GM Recall Remedy – 2024 GMC Sierra Denali 1500, 6\.2L V8** I am reporting a catastrophic engine failure involving my 2024 GMC Sierra Denali 1500 equipped with the 6\.2\-liter L87 V8 engine\. At an earlier date, my vehicle underwent GM safety recall 25V274\. The dealership performed the required inspection, changed the engine oil to 0W\-40, and installed the replacement 0W\-40 oil\-fill cap\. The truck was returned to service\. On October 31, 2026, I experienced an unexpected engine shutdown while driving\. The instrument cluster displayed “Please Restart Engine\.” I subsequently brought the truck to a GMC dealership for inspection\. The dealership reported finding nothing wrong and released the vehicle back to me\. On November 3, 2026, while driving home from that inspection, I attempted to pass another vehicle\. While occupying the passing lane, my engine suddenly failed and seized without warning\. The truck lost all engine power and began coasting\. I was forced to maneuver the disabled vehicle off the roadway and into a ditch\. I contacted OnStar roadside assistance, which located my vehicle and dispatched a tow truck\. The vehicle was transported back to the dealership, where it remains\. This engine failure occurred after completion of GM’s official recall remedy and immediately following an additional dealership inspection that found no problems\. I believe this incident warrants investigation under the federal safety agency Engineering Analysis EA26005, which concerns L87 engine failures following recall repairs\. The sudden loss of propulsion during a passing maneuver created a serious collision hazard\. I request that the federal safety agency investigate this failure and evaluate the effectiveness of GM’s recall remedy\. **Vehicle:** 2024 GMC Sierra Denali 1500 **Engine:** 6\.2L L87 V8 **Mileage at failure:** 40,035 **Final failure date:** November 3 2026

Filed Nov 1, 2026 · Electrical · KS

My 2024 GMC Sierra 1500 SLT has recurring failures of its factory 13.4-inch Google built-in infotainment system, creating significant driver-distraction hazards. Google Maps frequently freezes, crashes, or refuses to calculate routes, even to familiar destinations. Navigation malfunctions occur on approximately 90-95% of days I use it, although individual attempts sometimes work. Certain addresses consistently fail while others work. The system also experiences severe lag, intermittent audio interruptions, and voice assistant failures. The assistant often correctly transcribes spoken commands but fails to execute them. When navigation fails, I must resort to my phone to search for destinations, enter addresses, or manually select locations. Repeated attempts to operate the malfunctioning navigation and voice controls have diverted my attention from the roadway. On multiple occasions, this distraction has contributed to unintended lane deviations while driving on highways. These failures create a serious distraction risk, particularly when navigation is needed in unfamiliar areas. The dealership recommended Apple CarPlay as an alternative, but CarPlay causes additional connectivity and infotainment problems, so I have disabled it. The vehicle has undergone three dealership visits for these concerns. First, technicians reprogrammed the infotainment software using USB. Second, they diagnosed radio faults and replaced the infotainment module under warranty. The replacement performed worse, including repeated navigation failures during a trip near Ames, Iowa. On [XXX], at approximately 19,767 miles, Cable Dahmer of Topeka referenced GM bulletin PIC6602Y and advised that GM Engineering is investigating the issue. No further repair was performed, and no resolution timeline was provided The defects remain unresolved despite multiple repair attempts. I request the federal safety agency investigate whether these widespread infotainment failures constitute a vehicle safety defect INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATI

Filed Oct 30, 2026 · VA

The plastic attachment points and clips holding the upper chrome grille deflector fractured and flew off my 2024 GMC 1500 Denali.

Filed Oct 29, 2026 · GA

On Monday of this week I was driving on the freeway and the top trim piece flew off the grill and almost cracked my windshield. It flew over my truck and landed on the road. When I inspected the damage, the plastic parts that were supposed to keep the grill on the truck had cracked and the screws that would normally hold the piece in place were still screwed tight to the truck. I was lucky that no one was driving close to me because their vehicle could have been struck by this part.

Filed Oct 29, 2026 · Engine · 110,000 miles · TX · fire · 1 injury

The contact owned a 2024 GMC Sierra 1500. The contact stated that while driving approximately 65 MPH, there were flames coming from the front passenger side of the vehicle. The contact immediately pulled over and exited the vehicle before the vehicle became engulfed in flames. The Fire Department was called to the scene and extinguished the fire. The vehicle was destroyed and later towed away from the scene. During the fire, the contact sustained a leg and back injury from falling while frantically exiting the vehicle. The cause of the failure was not yet determined. The contact stated that the engine installed at the time of the fire was a replacement engine installed after the original engine had seized and was replaced under the federal safety agency Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The failure mileage was 110,000.

Filed Oct 28, 2026 · Engine · 23,400 miles · NC

The contact owns a 2024 GMC Sierra 1500. The contact stated that the vehicle was repaired under the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling); however, the recall repair failed to prevent a failure from occurring after passing the PICO Test. The contact stated that while driving 20 MPH, there was an abnormally loud metal clashing sound coming from under the hood. The vehicle was taken back to the same local dealer where it was test-driven, and the vehicle failed the new PICO Test. The failure mileage was approximately 23,400.

Filed Oct 28, 2026 · Body · CA

Subject: Complaint — 2024 GMC Sierra 1500 Denali, Upper Grille Deflector Detached at Highway Speed. To the Office of Defects Investigation, I’m filing this complaint regarding my 2024 GMC Sierra 1500 Denali. While driving on the freeway at approximately highway speed this afternoon, xxx, the upper grille trim piece located above the grille and in front of the hood spontaneously detached from the vehicle with no warning and no prior impact. It created a road hazard for other motorists. This matches the failure pattern described in Recall Query RQ26003, opened xxx, covering 2022 through 2024 Sierra 1500s. My truck is a 2024 and is not covered by Recall 25V‑060, which only addressed certain 2022 models. I’m concerned the defect is not limited to the originally recalled population, and that the 2025 remedy may not have resolved the underlying attachment-point failure. I request that the federal safety agency include my vehicle and all similarly affected 2024 trucks in any expanded recall or investigation, and that GM be required to provide a free repair. Vehicle: 2024 GMC Sierra 1500 Denali. VIN:xxxxxxxx. Mileage: 64,952. Date of failure: xxx. Location: [XXX]. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 27, 2026 · Body · TX

The upper front grille deflector (or chrome hood molding) on 2024 GMC Sierra 1500 AT4 with 38k miles broke off at 65 mph and hit the windshield. It could have cracked or hit a person or another car. No warning or prior issue at all. The plastic clips must have broke

Filed Oct 26, 2026 · Electrical, Fuel system · KY

My truck has experienced recurring diagnostic trouble code P244B on [XXX], [XXX], and [XXX], 2026. The latest occurrence included a check-engine warning and reduced engine power. On [XXX], at 40,833 miles, Neil Huffman Chevrolet GMC in Frankfort, Kentucky, diagnosed a damaged diesel particulate filter differential-pressure sensor connector. The dealership's written estimate states that the connector had shorted, begun melting, and had broken wires at the back of the connector. I am concerned about the cause of the electrical overheating, the possibility of additional wiring damage, and the risk of unexpected reduced engine power while driving. I have also experienced intermittent transmission-related warnings and communication fault codes, although I do not know whether these problems are related. I understand there are GM technical bulletins addressing wiring-harness damage on certain 3.0L Duramax vehicles. I am not claiming these bulletins establish the cause of my failure, but I would appreciate having my experience evaluated for a possible safety-related defect trend. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 25, 2026 · Tires · IA

This form would only let me select one tire, but all four tires on our truck are like this. They have pretty severe cracking/tread degradation. The mileage is 25,687. This happened suddenly. We have our tires rotated every 3,000 miles. The tire size is 275/50/R22. This appears to be a manufacturer defect. Our truck is garage stored and all paved and highway miles. We have scheduled to have them replaced right away.