Question about GMC Sierra 1500

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When running lights are on and i step on brake the right brake light comes on along with back up light,on the left side no brake light just back up light comes on,and parking brake light on in dash,and flashes when you turn turn signals on,lights on or off everything else works good

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Hi, is there a trailer plug on the truck? It sounds like something wasn't wired correctly or someone has been into the wiring. Another possibility is the harness getting trapped in a tailgate hinge. Look for something like that in the back of the truck. If you can tell me your model and year, I may be able to find the wiring diagrams. Thanks for using FixYa.

Posted on Mar 11, 2011


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