Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry your having this problem
when the RF goes dark what does the blue/white wire show for volts and is the black a good ground ?
testing with the RF not working
the blue/white wire is at the RF signal bulbs that should be a blinking 12 volts with the right signal on and the black should be right next to the blue/white wire and the black should be a good ground
if the black is a good ground and the blue/white is not blinking 12 volts and since these trucks do NOT use flashers anymore as everything is done inside the BCM the turn signal switch can not be the problem as it is telling the BCM to work those signals the problem is going to be a bad connection at the BCM or most common the BCM itself causing these problems and would need to be changed
how are you making out ?
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you need to get to BCM connector X4 ( black colored connector ) and terminal # ***** should be the blue/white wire to test right there
if it still doesn't show anything right at the BCM terminal then the BCM is bad