GMC Troubleshooting Questions? Ask a Mechanic for Answers
HI there, I am Cam. Can Ig et your first name please?Have you had a look under the fuse block yet? On these vehicles, the wiring under there is know for issue due to mice intrusion and nesting.
Ok Dan. With the tapping I think we would be best to start there. IF you can do that, you can get back to me on this thread if you do not find that is your issue.
Please bookmark this page so you can easily navigate back to it so we can continue the discussion. This is done by pressing (CTRL D on PC and CMD D on Mac). You can reply at any time for follow up information regarding this issue, even after you rate the site and I will reply.
OK, thanks. (ps, I need to be the last to reply otherwise it makes me respond to you before I can assist other customers so you need only reply when you have updates. )
Take the fender brace off, that’s the angle bracket with 4 bolts. Remove large cover. There are a couple tabs on engine side. >Lift it off. Then a tab can be moved against fender side to flip up the fuse block on a hinge.