Warning sounds fading?

ANGEL4U

MEMBER
2002 CHEVROLET TRAILBLAZER
4.2L
V6
2WD
AUTOMATIC
204,000 MILES

When I put my key in the ignition, when my lights are on without the key, my gas gauge is low, my turning signal is on to long the warning sounds (ding, ding, ding) has become very soft almost to the point of nonexistent. Could this be a fuse or a sensor? I just installed a new battery but that didn't take care of the problem. Do you know what it might be? Radio is still working too.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
43,288 POSTS

Does the engine start and run? If so, it sounds like the BCM is going out. To be sure I think a CAN scan will tell us if it is bad. A CAN scan is easy to do. You can get a CAN scanner (Controller Area Network) from Amazon for about $30.00.

Here is a video to show you how:

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

Here is a scanner link:

https://amzn.to/3o41KcZ

I have left the BCM replacement instructions and location in the images below just in case. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Images (Click to make bigger)

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Tuesday, September 6th, 2022 AT 5:58 PM

ANGEL4U

MEMBER
2 POSTS

Thank you, Ken, I ordered the CAN scanner which should be here on Monday. I'll give it a try, hopefully it can tell me what's going on. It's just really weird everything is just fading away. I'll let you know if that's the problem thank you so much.
Yes to answer your question the Blazer does run very well in fact I'm very meticulous at keeping up with the engine, it's just that I noticed that my warning bells started to fade away.

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Friday, September 9th, 2022 AT 1:57 PM

KEN L