NHTSA Complaint #11647697 — 2009 GMC SIERRA 1500 POWER TRAIN

Complaint Details

ODI Number	11647697
Vehicle	2009 GMC SIERRA 1500
Component	POWER TRAIN
Date of Incident	January 1, 2020
Date Filed	March 11, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	TX

Consumer Description

Allison transmission - random hard shifts, random multiple DTC's, random limp mode. Clear codes and works fine until it doesn't. Might have to clear codes 3-4 times a day or it might make it a week before it goes into limp mode again.

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