GMC Troubleshooting Questions? Ask a Mechanic for Answers
I am sorry for the long wait
can you tell me the code numbers ?
how does it shift ?
if we know the code numbers we will know exactly which direction to take
does it shift 3rd and into 4th ?
let me know the code numbers setting tomorrow and then we will know exactly which way to go with this issue
are you sure the fuse called IGN0 in the fuse in the fuse box is good ?
if that fuse is good does it show 12 volts on both sides of the fuse testing it in place through the little openings in the tops of the fuse ?
are you sure the big round connector is plugged in at the passenger side front of the transmission ?
can you see with the key ON if that fuse shows 12 volts ?
if it does then with the key ON see if the pink wire at the transmission big connector shows 12 volts