2011 GMC Yukon SLT

[Vinny2011]

I have a 2011 GMC Yukon SLT and I've been having problems with the ABS light being on, traction control, service stabilitrak, trailering brake, Have to press brake pedal hard and repeatedly to shift out of park, Replaced Brake pedal position sensor no help, also cruise control used to work intermittently, doesn't work at all now. Don't know how many of these problems are related just wondered if anybody had any info or ideas on how I can fix these problems

 

[Big Mama]

Cruise won’t work if you have those issues. Have you had a scan done to get trouble codes? Many times these can be traced to problems with your grounds. Does your rig run and drive well?

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

Getting the actual trouble codes will go a long way to get to the root cause of your issue, and avoid firing the parts canon.

Have you recently done any work on the truck, particularly on the brake system, other then the brake switch replacement?

 

[John H Daniel]

Whenever I hear about the electrical gremlins I say check the eng area fuse box. I had random shut off, headlight issues, stabilitrack warnings that would come and go. The big circuit board that all the connections and relays sit on was dirty and corroded. see pic.
Took apart and cleaned it, all works normal. I found it by wiggling the big wiring bundles coming to the fuse box. Lights would go on and off etc.
2011 Denali, btw.