Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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These are very common for the rear tail light assemblies being corroded. I would start here. Remove the tail light assembly and the electrical circuit board is attached to the lens. Once removed take the gaskey off and look for any corrosion. If there is any replacement is the best option. The new ones are a better design.
OK. Let me know what you find. With The LEDS it really makes me suspect you have a bad tail light causing the issues. Make sure you check your ground connections.