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2008 GMC Sierra 2500 HD 6.6 LMM
Posted to Technical Discussion Forum on 5/7/2020 9 Replies

I have this 2008 GMC Sierra 6.6LMM that came to us because it would not regen.

We performed a manual regen and found a p0571 Brake light switch code. We were told by a Technical resource that a P0571 would stop the vehicle from regening.

When we diagnosed ... Login to read more.

9 Replies Received (View Replies)

 

car Vehicle Data

2008 GMC Sierra 2500 HD SLT 6.6L

Engine6.6 L
Trans6-speed Automatic (Electronic)

car Vehicle Data

2008 GMC Sierra 2500 HD SLT 6.6L

Engine6.6 L
Trans6-speed Automatic (Electronic)