NHTSA Complaint #11672242 — 2020 GMC SIERRA 3500 POWER TRAIN

Complaint Details

ODI Number	11672242
Vehicle	2020 GMC SIERRA 3500
Component	POWER TRAIN
Date of Incident	July 9, 2025
Date Filed	July 9, 2025
Mileage	130,000 miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	UT

Consumer Description

The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently went into LIMP Mode. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the transmission valve body sensor had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 130,000.

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