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218 complaints
↗GMC SIERRA 1500 2023 ENGINE
lowDriving down the interstate at 70 miles per hour, started losing power, engine light came on. Engine started making a loud banging noise as I pulled onto an exit.
↗GMC SIERRA 1500 2023 ENGINE
mediumEngine knocking. Engine being replaced under warranty due to premature bearing failure. Picotest was performed prior to my purchase with 12800 miles. 0w40 oil being used at the time of failure. At …
↗GMC SIERRA 1500 2023 SERVICE BRAKES
mediumFailure to release parking brake. Lining material improperly bonding to steel shoe from Manufacturer. Service Parking Brake warning Indicator âonâ
↗GMC SIERRA 1500 2023 STRUCTURE:BODY
highI was driving down the highway and the front Upper Grille Deflector flew off while at highway speeds. Due to the nature of being on a highly congested bridge, the grill piece flying off could've serio…
↗GMC SIERRA 1500 2023 ENGINE
lowOct 2025 I took my truck into my local GMC dealer for 6.2 recall. I was told it passed the testing. 6/12/26 driving about 70mph on highway and lost all acceleration. Warning stating engine oil hot,/…
↗GMC SIERRA 1500 2023 ENGINE
lowWhile driving vehicle on state highway exit at approximately 55 mph a knocking noise started coming from engine then engine just died and would not restart. Engine was replaced under recall.
↗GMC SIERRA 1500 2023 FUEL/PROPULSION SYSTEM
medium1. The L87 Engine Loss of Propulsion failed and is available for inspection at the service department at Power Swain Chevrolet dealership, Fayetteville, NC. 2. I, other vehicles, cyclists, and pedestr…
↗GMC SIERRA 1500 2023 STRUCTURE
mediumThe contact owns a 2023 GMC Sierra 1500. The contact stated that while driving approximately 70 MPH, the front grill deflector was ejected from the vehicle. The vehicle was taken to the local dealer, …
↗GMC SIERRA 1500 2023 ENGINE
mediumModel: Sierra Denali Ultimate Engine: 6.2L V8 VIN: [XXX] Mileage at Most Recent Incident: Approximately 52,000 miles Safety Complaint Summary I am submitting this complaint to report a recurring loss…
↗GMC SIERRA 1500 2023 VEHICLE SPEED CONTROL
mediumI was driving my family on the highway and my truck completely shut down. The screen flashed a warning and it slowly started decelerating. Thankfully I was able to make it to the shoulder of the roa…
↗GMC SIERRA 1500 2023 ENGINE
lowTruck starting bottom end knocking noise at 57,700 miles. Engine had the recall done to it for Pico test and passed. Dealership states now it will need a new engine.
↗GMC SIERRA 1500 2023 ENGINE
medium[XXX] [XXX] Phone: [XXX] Vehicle Information: Year: 2023 Make: GMC Model: Sierra Denali Ultimate Engine: 6.2L V8 VIN: [XXX]: Mileage: Approximately 52,000 miles BACKGROUND: I previously had the engine…
↗GMC SIERRA 1500 2023 VEHICLE SPEED CONTROL
lowAfter driving my vehicle for a short period of time I stopped to go shopping. When I returned to my vehicle I started it as usual and the check engine light illuminated. I began driving and within 0.…
↗GMC SIERRA 1500 2023 VISIBILITY/WIPER
highThe plastic upper rail glass guide frame on the rear sliding window assembly of my 2023 GMC Sierra developed structural micro-cracks during normal vehicle operation. This manufacturing defect is a kno…
↗GMC SIERRA 1500 2023 STRUCTURE:BODY
lowIt was the Chrome Grille Deflector and is available for inspection. I was driving down a long road at roughly 50 mph when all of a sudden the grille deflector detaches from my bumper and hits my winds…
↗GMC SIERRA 1500 2023 STRUCTURE:BODY
lowAs I was driving down the highway the hood front molding flew off and took a chunck of paint off my GMC 2023 AT4, hitting a elderly ladies windshield we pulled over there was no damage to her car than…
↗GMC SIERRA 3500 2023 WHEELS
highMay 3 2026 was traveling on highway when my 2023 dually duramax wheels locked up on me causing me to hit a guard rail and then truck would not go into any gear and was toast after first dealership it …
↗GMC SIERRA 3500 2023 WHEELS
highWhile out of Town driving back home Wheel lock up on my 3500hd dually 2023 gmc .. vehicle had shudder effect and from 75 to 25 mph drasticly and engine reduced power light came on and wouldnât come …
↗GMC SIERRA 1500 2023 ENGINE
mediumAfter completion of recall repair, changing oil weight from 0w20 to 0w40, I encountered loud squealing and knocking sounds from the engine bay. As catastrophic failure has been reported the vehicle wa…
↗GMC SIERRA 1500 2023 ENGINE
mediumI took the truck in for a recall they notified me and said it failed the test and there was metal in the oil and said it needed a new engine
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