NHTSA Complaint #11676125 — 2021 GMC SIERRA 1500

UNKNOWN OR OTHER issue reported to NHTSA

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Complaint Details

ODI Number	11676125
Vehicle	2021 GMC SIERRA 1500
Component	UNKNOWN OR OTHER
Date of Incident	June 1, 2025
Date Filed	July 25, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

The plastic frame of the rear sliding window failed. This has allowed water to enter the cabin, which can cause mold and other health issues. This seems to be a common issue with these trucks. My truck has a certified preowned warranty and GMC said they would only cover part of it. They charged me $400 as a deductible, which there should be no deductible per certified preowned warranty. I feel like GMC needs to put out an official recall.

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