I have a 2003 GMC Sierra truck. at the trailer plug in connection on the back of my truck, I only have right turn signal, no brake light, evreything else is fine.

Asked by Archie4n4 Sep 05, 2018 at 10:10 AM about the 2003 GMC Sierra 1500 SLE Extended Cab LB

Question type: Maintenance & Repair

3 Answers

5,085

Have you done any troubleshooting yet? I'd start with the fuses. So to clarify, only the brake signals have an issue? You have a right turn/tail and left turn/tail with no brake? Some of these trucks have a center instrument panel fuse block. If you have this fuse panel, check the relay of the attached photo. You should be able to press the brake and hear/feel a click.

1 people found this helpful.

Thanks for your response, I have checked all those fuses side panel and under the hood panel. I didn’t check the relay, I will check that after work. I will let you know either way after I check that relay. Thanks again

I found my problem after taking it to the garage, rodents got in and chewed up the wires, all fixed now. Works great,,

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