2011 GMC Yukon Denali Questions
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When the vehicle is unlocked, the mirror continually folds out instead of tilting to the proper position. In reverse, the mirror assembly constantly, repetitively, and slowly "clicks" to the curb side view. The same will occur when the vehicle is placed in drive and when the mirror attempts to return to its original position.
wait till the "pig tail" light goes out and try to start and it won't start