6.2L V8 engine failure and loss of propulsion
ENGINE
50 NHTSA complaints · 2025-07 → 2026-08
“Complete engine failure while driving on a highway. While cruise was set, the truck emitted a sound and sensation like we had run over something on the highway. Within a few minutes the engine started ticking”
“Our truck had just passed 60,000 miles when the engine seized. The recall procedure was completed in January, and the engine passed the test at that time”
“2023 GMC SIERRA DENALI ULTIMATE 1500 WITH 6.2 V8 AT HIGHWAY SPEEDS 65 MPH THE CAR LOST PROPULSION AND SAID IT WAS IN NEUTRAL. CAR WOULDN'T SHIFT BACK INTO DRIVE. BARELY MADE IT OFF THE HIGHWAY WITHOUT AN ACCIDENT”