GMC Sierra parking brake light stays on

[magnumv8]

I just finished reading the diagnostic repair procedure for your issue and I am afraid your only choice for repair is to go through a repair facility that has the proper scan tool to diagnose your problem....your truck apparently does have the BCM module and it monitors all of the brake systems, so your issue could be anywhere from a short to a bad switch, sensor or BCM.....the repair sequence has 14 separate steps to diagnose the problem and unfortunately you need the proper scan tool to do it.....

D L Rambo Stk1300

Update:

Took the truck to one of our local GM garages two weeks ago. Long story short the truck sat there for two days without them getting to it so we went and picked it up. Keep in mind we called for an appointment and had to wait a few days and went in when they said to bring it.

It's now at another garage (friend of a friend) so we'll see what they find.

I still have to think it's electrical in nature and not related to the parking brake as it came on when we unplugged the trailer the last time. Tried plugging the trailer back in but that didn't get it to come off.

I'll post when I hear back from the garage.

Low fluid sensor in the brake fluid reservoir was bad. Unplugged the sensor on the side and the light went out. Going to change the reservoir and external sensor. Pretty simple fix for a frustrating problem.

[FrankChastain]

Thanks TH always good to see someone get a real problem fixed and tell others. Like DW says an't nothing like sperence......Frank

Originally Posted by Tar Heel

Low fluid sensor in the brake fluid reservoir was bad. Unplugged the sensor on the side and the light went out. Going to change the reservoir and external sensor. Pretty simple fix for a frustrating problem.