Right side blinker and the right mirror turn signal will not turn off

2010 CHEVROLET 2500
75,000 MILES • 0.6L • V8 • 4WD • AUTOMATIC
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CORVETTE2
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The right side marker lamp and the right mirror turn signal lamp stay on after the truck is turned off. changed headlamp, fuse, relay, turn signal switch, headlamp switch and the side marker is still on. I replaced the turn signal switch as well, headlamp switch, replaced headlamp pig tails, relay, grounds are good Help me LOL please help. thank you, Rick
May 20, 2021 at 12:10 PM
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STRAILER
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It sounds like the BCM is is out. To be sure lets do a CAN scan which is the future of automotive repair. you can get a CAN scanner from Amazon for about $50.00. here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is the BCM replacement instructions with the blinker wiring diagrams so you can see how the system works. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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May 21, 2021 at 10:34 AM
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CORVETTE2
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Thank you very much, I have ordered the BCM, and I will let you know the outcome . Thanks again, Rick
May 21, 2021 at 3:26 PM
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STRAILER
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Please let us know what you find. We are interested to see what it is.
May 23, 2021 at 10:08 AM