Question about 2003 GMC Sierra 1500
I have a 2003 sierra and when i hook up to trailer i have no left hand brake light. I had a friend hook his truck up and all lights worked on trailer. I had a RV dealer check all my fuses on the truck and all were good, all lights work on the truck. The 7-way was on the truck when purchased. What else should i be looking for.
I had the same problem but when i tested the left turn signal then tested the brakes both brake lights would then work.
Posted on Mar 04, 2009
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