2005 Yukon Denali OnStar Rear View Mirror Problem

[Otter]

The OnStar rear view mirror in my 2005 Yukon Denali has an issue. If I depress the brake pedal the passenger air bag display, both green lights, temp and direction, and the OnStar work. I can push the left hand button and turn the temp and direction display on and off. When I release the brake pedal the mirror stops working. Any idea of what the problem could be?

Otter

 

[S33k3r]

The OnStar rear view mirror in my 2005 Yukon Denali has an issue. If I depress the brake pedal the passenger air bag display, both green lights, temp and direction, and the OnStar work. I can push the left hand button and turn the temp and direction display on and off. When I release the brake pedal the mirror stops working. Any idea of what the problem could be?

Otter

There are several problems it could be. There could be a loose board/connection actually inside the mirror; the connection to the mirror at the back could be bad; wiring in the dash could be bad; etc. Your best bet is to either meter the connections going up to the mirror, or pay someone to do so. If it's the mirror, las I saw it was about $50 to get it rebuilt (plus shipping).

 

[Otter]

PROBLEM SOLVED! There was a wire harness to the left of the brake pedal arm the was getting pushed on when the brake pedal was depressed. Re positioned the wire harness and zip tied it and the mirror now works.