GMC Troubleshooting Questions? Ask a Mechanic for Answers
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
Are you saying when pressed the light does not come on or when pressed no change is noticed in the way it up and down shifts?
So far possible causes are the switch wiring or the switch itself if the light does not come on when pressed.
Hello again Chris here,