I'm trying to troubleshoot an issue on my 18' Suburban. Over the last couple of days I've had the Stabilitrac message come on, ABS light is on and now as of today the Park Assist is unavailable. I have noticed the ABS try to engage once coming out of a stop sign for a few seconds then quit. No check engine lights.

Originally I assumed wheel sensors so I have new ones ordered and inbound which also appears to be a common problem. But now that the Park Assist unavailable message joined the circus I'm beginning to wonder if that's really the issue.

Plan on checking all the fuses and wires tonight and will swap out wheel speed sensors tomorrow. Anything ideas on what else I should be looking for?

 

Traction control and parking systems will never set a check engine light, that will be a stored code in the ABS control module. You will need a higher end scanner to access modules other than the ECM, theee will be a stored code so either take it and have it scanned or buy an expensive scanner, up to you.

 

Thought I'd come back and explain what the issue was. After tracing wires coming from the ABS module it was pretty clear that the rear driver side wheel speed sensor wire was broke somewhere under the chassis. Nothing reading at the ABS module for that wheel. The wheel speed sensor itself was reading fine. After inspecting the wire it seemed as if the broken wire was going to be between the frame and the body. Everywhere that I could access the wire, the wire looked fine. I opted to splice a wire into the existing wire vs lifting the body. After the wire was spliced I had power at the ABS module again.

In my case the problem was a bad wire. All lights are gone and vehicle is back at 100% again.