Canyon Service Stabilitrak - No check Engine - No Power Steering Failure

[bby rmsk]

Hi All,

 

Need a bit of help if you can,

 

Have a 2017 Canyon crew cab Duramax- 

 

Service Stabilitrak was intermittent, but recently is popping on and staying on.

Have not had any other issues, with either starting, Power Steering, or Transmission 4x4 Control.

 

Pulled Codes:  got alot of communication errors, 

cleared and re pulled a few times same codes come up.

 

U0077 - Comm errors

U0100 - PCM

U0101 - TCM

U0121 - ABS

U0131 - PSCM

U0151 - Restraint

U0415

 

 

Interestingly I get a C0196 - Yaw sensor, but i can't find a yaw sensor on the electrical diagrams.  

 

There is a TSB that says check for frayed wires, checked in the area's noted Driver sill plate, passenger plate, under chassis, cant find a break, or tear.  

https://static.nhtsa.gov/odi/tsbs/2018/MC-10151859-9999.pdf

https://static.nhtsa.gov/odi/tsbs/2019/MC-10162127-9999.pdf

 

found some things with Acadia and Sierra, not sure if similar with canyons

 

Any one had a similar issue? 

Any other places to check, next up is the grounds  on the back near the Chassis Control, remove clean replace

Edited July 12, 2020 by bby rmsk

[bby rmsk]

Sorry Disregard,

 

Found the Issue, there was a harness that was touching the pulley for the A/C Compressor, at the underside of the cable.

 

It near cut through the blue yellow/ white twisted pair wire for the GM LAN.

 

fix:

Cut the line,

heat shrink on,

solder a join between the cut on the corresponding lines

re-wrap

pull the harness off any moving parts and zip tie