NHTSA Complaint #11598426 — 2020 GMC SIERRA 3500 POWER TRAIN

Complaint Details

ODI Number	11598426
Vehicle	2020 GMC SIERRA 3500
Component	POWER TRAIN
Date of Incident	March 30, 2024
Date Filed	July 2, 2024
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	IA

Consumer Description

driving 45 mph westbound i70 at eisenhower tunnel, vefhicle made loud bang, brakes locked up momentarily slowing vehicle to around 25mph. multiple vehicles had to make evasive manuevers to avoid collision. vehicle released after a 15FT skid. pulled over to safety and inspect for damage, tires were falt spotted but no damage was visible. called dealer servcei and was told to make appt and set for diagnostic. service could not replicate or find damage so I was sent on my way and told if it does it again let us know. I am scared to drive this vehicle its unsafe

Related Complaints for the 2020 GMC SIERRA 3500

Other POWER TRAIN Complaints

#11672242 — July 9, 2025 — The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving at an undisclosed speed, the vehicle i...

#11672009 — July 8, 2025 — The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving at 60 MPH, the rear differential seize...

#11654874 — April 15, 2025 — Valve body failed while pulling my camper down the interstate. Transmission began to have issues and locked up on us ...

#11648300 — March 14, 2025 — Greetings. In December 2024, I brought my vehicle in for the rear end lock up recall. The recall reprogrammed the t...

#11646537 — March 5, 2025 — The contact owns a 2020 GMC Sierra 3500. The contact received notification of NHTSA Campaign Number: 24V797000 (Power...

Recent Complaints for the 2020 GMC SIERRA 3500

#11712433 — ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:UREA INJECTION SYSTEM (DEF) — January 21, 2026 — Diesel exhaust fluid tank heater malfunctioned and meted tank and connectors.

#11712433 — UNKNOWN OR OTHER — January 21, 2026 — Diesel exhaust fluid tank heater malfunctioned and meted tank and connectors.

#11693845 — STRUCTURE:BODY — October 16, 2025 — Known defect with 2019 and now 2020 GMC sierra trucks. Design was updated for 2021+ which has corrected the seal fail...

#11691992 — ENGINE — October 8, 2025 — the engine seized at 65mph. available for inspection. was left stranded in a limited access area with no cell service...

#11670439 — STRUCTURE — July 1, 2025 — The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving 45 MPH with passengers seated in the r...