Question about 2003 Chevrolet Silverado 1500
Have not altered wiring just started on its own
It could be a ground problems .. if ground at brake lights is not good then it could take it through back up lights
check all ground to rear end like parking lights,brake lights, back up lights and flasher
if you have a trailer harness check connections for trailer could be a big problem
hope it helps
Posted on Mar 31, 2014
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Posted on Jan 02, 2017
SOURCE: Brake lights
If you have an aftermarket trailer towing plug on it, that's where i would look first. Something is shorting out in there, or you have a broken wire or ground somewhere. Proabably near the back where gravel stones can hit.
Posted on Oct 07, 2009
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