Loss of propulsion with warning messages while driving
POWER TRAIN, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
13 NHTSA complaints · 2025-01 → 2026-06
“While driving at highway speed, my 2025 GMC Sierra suddenly began slowing down without warning and lost propulsion. When I pressed the accelerator, there was no acceleration response”
“While driving on the highway at 70 MPH, the truck experienced a harsh transmission shift followed by a sudden loss of acceleration and entered shutdown mode to protect the engine”
“While driving in bumper-to-bumper traffic, my vehicle suddenly lost all engine power, the accelerator became unresponsive and the dash indicated "press start". There were no warning lights, no messages, and no prior symptoms before the failure occurred”