| Have you done or had done any work to the van recently? Make sure all the ground wires are tight, the main cable from battery to block, and and body grounds between battery and body. Also check at the back of the intake to see if there are some ground wires hooked on a stud going thru the intake, make sure the stud is tight and the nut that holds the wire down. Check to see if windshield is leaking and water is running into ECM ( not uncommom on some GM models). Is the speedometer working properly? If not get it fixed and see if that helps. When was the trans last serviced? If it has been more than 25k have it done again. |