It could quite possibly be the sending unit, that is located in the fuel tank. The electronic "board" gets crudded up and you must drop the fuel tank and pull out the sending unit which is part of the fuel pump. It's best to have as little fuel as possible in tank when doing this but It's not that difficult if you have a little mechanical ability. Two straps hold tank to frame. Drop tank, pull unit from top of tank, clean or replace.
That would be the 4L80E transmission.
Why would you want to unhook the Electronic Spark Timing?
yes it will.
If V* it is: 1,8,4,3,6,5,7,2
If your 1995 Chevy 2500 truck won't go in reverse, you got some transmission problems.
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Check the module under the distributor cap.
Chevy 8 lug is Chevy 8 lug
Could be in need of a tune up.
It will be inside the glove box to the right. You will have to remove the glove box.
That would be the 4L80E.
That would be the 4L80E