Radio Stays on and Park Assist Malfunction?

BCHARRELL1959

MEMBER
2013 CHEVROLET TAHOE
5.3L
V8
4WD
AUTOMATIC
165,000 MILES

My vehicle listed above started having strange electrical issues a few weeks ago. I had a spill into the large tray in the center console, but I don't think anything leaked into the area underneath. But about the same time, the battery ran down completely, and it turned out the radio had stayed on for about a week while I was out of town. The volume controls on the steering wheel no longer work and the radio produces no sound from any speakers. Also, the park assist function for the rear back up sensors stopped working. I've been told this could be a BCM malfunction or a RAP switch failure. The interior lights and headlights do go off about 30 seconds after the ignition is turned off as normal. Where would you suggest I start looking? Thanks.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,642 POSTS

It does sound like the BCM or VCIM is out, but we should do a CAN scan to see what codes are in the system. 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 how to change the BCM out in case a code comes up for it, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know how it goes.

Images (Click to make bigger)