Turn signal problem

By Shannon Lauer
September 14, 2019 in 1999-2013 Silverado 1500 & Sierra 1500

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Shannon Lauer

Posted September 14, 2019

I have 99 Chevy Silverado. My turn signals and hazards work only when key is on but when I start truck they dont work at all. I have replaced multi function switch, relay flasher and fuse. What could it be?

Colossus

Posted September 15, 2019

hmmm Good question. I wonder if something in the ECM/BCM.

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