Dash light and park lights come on?

Tiny
DONNIE JACK COX
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 231,186 MILES
When I turn truck on running lights come on like they should but my park lights come on to with my switch off only way at night to get my dash lights to come on is my dimmer switch which I put it all the way up that supposed to be for my dome light. I don't know what's going on at night my head lights be flickering but my voltage does not drop down.
Saturday, March 29th, 2025 AT 1:36 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,134 POSTS
It sounds like the BCM is having an issue, here is a guide to show you how to scan for BCM codes to help confirm the failure. 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

Here is the scanner for $26.00:

https://amzn.to/4gdSpcb

Let me know what you find. Also, I would check the BCM grounds and fuses as well, the BCM will act funny when fuses are blown.
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Monday, March 31st, 2025 AT 12:29 PM

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