Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Is this a 4l80? any codes? How many miles on the unit?
can you tell me the code number please
have you followed the trouble tree / flow chart?
so the harness tested good as well as the vcm?
with that code its generally vcm or harness
Check default shifts by removing fuse for tranny. Shifts will be hard but it will shift all 4 gears if no mechanical problem
Chech line pressures ...bushings, wave washers and pumps are likly and expensive and last resort
not gm approved..but its a cheat to see if its mechanical or electrical...gm does not fix cars and neither does the repair manual...sometimes you need to think out side of the box..
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half way between Albany and Syracuse...
Im not a full blown redneck...but can wing it...