Trailer brake warning light

By Jen Grose
August 21, 2019 in Ask A GM Technician

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Jen Grose

Posted August 21, 2019

We have a 2011 Silverado 1500 we purchased recently. The trailer braking system seamed to work but while pulling the trailer the warning came across to check the brake wiring. We replaced the plug in the back and it quit. Then it came back on and went out again. It's not the trailer... doesn't do it with the other truck. We wiggled the plug and it came on but didn't stay on. Moved wires underneath and it did the same thing. All the lights work on the trailer... just not the brakes. What could the problem be?

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