Question about 2006 GMC Sierra

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Allison transmission when you put trans into 'D' there is a delayed enguagment, and then a somewhat harsh enguagment, as well the trans trouble light illuminates. the DTC is p0762 (solenoid 3 stuck on). i have tested the continuity of the circuit from teh TCM to solenoid #3, the trans has been dismantled and the tech found one of the bearings apart and debris in the vlave body. replaced the defective bearing and verified the valves had a smooth operation, re-assembled and it has been re-installed into truck. But the same problem as before.

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Replace solenoid prob has frags in it hanging it up....

Posted on Aug 18, 2008

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