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

Tiny
DARREN L ANCELL
  • MEMBER
  • 2013 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
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.
Thursday, November 16th, 2023 AT 11:42 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
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

Check out the images (below). Please upload pictures or videos of the problem so we can see what's going on.
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Friday, November 17th, 2023 AT 11:43 AM
Tiny
DARREN L ANCELL
  • MEMBER
  • 9 POSTS
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.
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Sunday, December 17th, 2023 AT 9:41 AM
Tiny
DARREN L ANCELL
  • MEMBER
  • 9 POSTS
I forgot to mention my can scanner is a PT W2977.
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Sunday, December 17th, 2023 AT 9:57 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
That scanner will not do a CAN scan unfortunately so it can see if the BCM is having an issue.
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Monday, December 18th, 2023 AT 9:39 AM

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