The truck in question is...2007 GMC 3500 4x4 LBZ 6speed allison..
Sometimes the trans won't inguage and you have to turn it off and on a time or two. It acts like it's the nutral possition switch but the dealership said it doesn't have one!:what
I read in another thread that maybe changing the filters and fluid might help but the fluid in this truck is very clean already!
It's a recent purchase so not forsure but the fluid in this truck is very clean and bright red! But I guess they could have only changed the fluid and not all the filters so I will service it and see if it happens again..
If the service doesn't fix it does that mean the pump is bad or whole tranny or???
Ding Ding-- I think we have a winner. That sounds like the problem-- sucking air. They do make a filter lock for the deep pan and the standard pan. Abt $20.
@DmaxByFarr, I have read through the post of your situation with your truck. I am glad that you were about to see what was going on. How is it driving now?
Michelle, GM Customer Service
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