Quote:
Originally Posted by JET
We have a 2003 Denali, just a fancy version. The main reason the trannies go out is they switched to plastic accumlator pistons in the tranny. You can buy the aluminum ones for under $5 and don't have to pull the tranny to swap them. Our tranny went out at 116k and the piston for the 2-3 was broke. Other than that it has been a great vehicle. Got it with 70k on it and 146k now.
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Just hope that the awd transfer case doesn't fail. I have only rebuilt 1 of them and the main shaft spline were twisted. Probably from abuse.
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