NHTSA Complaint #11687786 — 2023 GMC SIERRA 1500 ELECTRICAL SYSTEM

Complaint Details

ODI Number	11687786
Vehicle	2023 GMC SIERRA 1500
Component	ELECTRICAL SYSTEM
Date of Incident	August 1, 2025
Date Filed	September 17, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

Truck will down shift and transmission will slam, super hard. feels like i hit something. almost causing accident. dealership refuses to service my truck or even take a look at the transmission because "its not broken yet" in their words " it needs to fail before they can service it or even look at it, because they wont get paid." I have expressed my concerns about this safety issue and at this point they are being negligent. My truck is a 2023 gmc sierra 1500 with 3.0 duramax . still under warranty with only 35k miles.

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