Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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There are two different components that will cause this issue here.First is the Body control module as it commands the back up lights on.This computer sends a signal to energize the back up lamps relay in the under hood fuse box (which on this model this relay is part of this fuse box unfortunately) and then this relay turns on and off these lights.The other issues is the relay itself at fault sticking on.If the relay needs replaced the entire under hood fuse panel needs replaced as this relay is built into the fuse panel.
The only way to tell which is the cause here for sure is with electrical testing,testing the signals out of the body control module and at the relay to see which needs replaced.
The only other thing that would cause this here is if a remote start or alarm system after market was installed and something was wired incorrectly or has failed electronically with the after market system causing this here.
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