The left turn signal stays on until you switch it to the right side?

2013 CHEVROLET SILVERADO
120,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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DARREN L ANCELL
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The left turn signal stays on until you switch it to the right side, it doesn't work either. I changed out the turn signal switch it lasted a couple of days and went back to doing the same thing.
Nov 16, 2023 at 11:42 AM
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STRAILER
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The turn signals are controlled by the BCM which sounds like it is going out. Here is a guide to help you do a CAN scan to confirm the problem and I have included how to change the BCM out, you can get a preprogrammed unit by searching Google or Ebay.

You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:


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


And this can help as well:

https://www.2carpros.com/articles/how-to-replace-a-bcm-body-control-module

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Nov 17, 2023 at 11:43 AM
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DARREN L ANCELL
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I have a can scanner and it does not show a code of any kind. Could I have a short somewhere possibly? Thank you in advance.
Dec 17, 2023 at 9:41 AM
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DARREN L ANCELL
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I forgot to mention my can scanner is a PT W2977.
Dec 17, 2023 at 9:57 AM
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STRAILER
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
That scanner will not do a CAN scan unfortunately so it can see if the BCM is having an issue.
Dec 18, 2023 at 9:39 AM
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