
P2175 Sudden downshift to 1st gear 6L-80
We put a factory remanufactured transmission in this truck about 3,000 miles ago and all was good until a few days ago. He was driving along and the vehicle suddenly down shifted into first gear. He pulls over, and shuts the vehicle off for a few minutes and t... Login to read more. ![]()
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Engine | 5.3 L |
Trans | 6-speed Automatic (Electronic) |
Vehicle Data
2016 GMC Sierra 1500 Denali 5.3L
Engine | 5.3 L |
Trans | 6-speed Automatic (Electronic) |