NHTSA Complaint #11671482 — 2014 GMC SIERRA 1500 POWER TRAIN

Complaint Details

ODI Number	11671482
Vehicle	2014 GMC SIERRA 1500
Component	POWER TRAIN
Date of Incident	June 12, 2025
Date Filed	July 6, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	MS

Consumer Description

Catastrophic transmission failure. Original transmission failed at 113,00 miles. I replaced it at the dealership with a factory rebuilt transmission and that transmission failed after only 40,000 miles. Now the vehicle is back in the dealership shop and they want me to replace the transmission a third time. This transmission is the 6L80 which is prone to fail, the torque converter fails and the transmission locks up I contacted General Motors and filed a complaint with them and they said they would not take any action or assist me with the repair.

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