Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Was anything after market installed at all before this issue occurred or any repairs done recently before this occurred?
Let me know so we can continue,thanks Pete
Looking at the components that are connected together with this issue here this sounds like a fault with the BCM (body control module).I have seen the BCM fail in the past before needing replaced for electrical faults like this here.If you have not had the fault codes checked/read out this should be done to see if any codes are set in the BCM.This will require a scan tool that can plug in and communicate with all computers in your model here.
The scan tool is also used to monitor signals from the BCM to help ensure this is the cause as well as a multi meter to test the electrical signal from the BCM.
I suspect the BCM is the cause here needing replaced.
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