GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, My name is ***** ***** for the delay.I will do my best to assist you.
lets try something simple here.
use,WD40 and spay inside all the door latches the best you can,,then open and close the doors a few times to work the latches.
sometimes these latch switches can get dirty and corroded and stick,causing the problem with the lights..
let me know how it gos
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i dont have the part#,,and yes,,i would think you will need to get them at the dealer only
these dont need programmed on a 03