I have a sporadic problem with my 2004 chevy express 3500. I have isolated when it does it and how to solve the problem when it does, but that's not good enough. The local dealer service department can't fix it.
When I drive several hours, then sit idol for a while, it will not shift to high gear. I don't ever feel it shift at all. It is a struggle, just to get it to go 45mph.
The only way to fix it is to disconnect the battery, then connect it back up.
If you have specific details as to the times , rpms , conditions that cause the problems take it to an accredited auto transmission specialist shop and have it diagnosed
with your details they should be able to pinpoint the fault as it will not be uncommon
SOURCE: 2004 chevy 3500 express passenger van transmission
if ur replacing it remove front grill disconnect both lines and carefully remove retaining clips from radiator if replacement is original eguipt mount & reconnect --if its a universal follow instructions usually cut off fittings and use clamps and hose to hook up
SOURCE: 2001 chevy express van 3500 while driving security light comes on
You need to get the codes from the theft deterrent module.Usually a B2960.This will help in the diagnosis of the problem.Hope this helps.Good luck.
SOURCE: 2004 Chevy Silverado Z71 stuck in 4 low
I HAVE THE SAME PROBLEM. CHANGED SWITCH AND THE SAME THING. I START THE TRUCK AND IS IN 4 HI. THEN HIT AUTO AND THEN 2WD THEN IT SHUTS OFF. AND SERVICE LIGHT COMES ON. STAYS IN 2WD. I CAN HEAR ACTUATOR WHEN TRUCK KEY IS TURNED AND CHANGE WHEN BUTTONS ARE PUSHED. I READ IT COULD BE GROUND UNDER DRIVER SIDE BAD. NEEDED TO BE CLEANED. I WILL TRY TOMORROW
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