2001 GMC Sierra transmission

forkey

i have a 2001 gmc serra trans would not shift to high so i put a used unit in it was worse so i had the origsnal rebuilt it only has 2nd and third took it back out tranny shop went back through it said all checked out fine that my computer was bad so i sent it to the dealer had a new computer installed that didant work i checked all fuses and elect conections several times no change

thecardoc3

Use the iATN member directory and find a diagnostics/electronics specialist. http://www.iatn.net/

This is not a difficult issue for the right technician.