PI0639B

File in Section:
Service Bulletin
Bulletin No.:
Date:
PI0639B
May, 2013
PRELIMINARY INFORMATION
Subject:
Service StabiliTrak Message Displayed in DIC, StabiliTrak Indicator Light On, DTC
C0455 and/or C0710 Set
Models:
2007-2013 Cadillac Escalade Models
2007-2013 Chevrolet Avalanche, Colorado, Silverado, Suburban, Tahoe
2008-2013 Chevrolet Express
2007-2013 GMC Canyon, Sierra, Yukon Models
2008-2013 GMC Savana
All Built Prior to October 01, 2012
This PI is being revised to add the 2013 model year and update the labor operation
information. Please discard PI0639A.
Condition/Concern
In rare cases, some customers may comment about the Service Stabilitrak message being displayed in the DIC. The
StabiliTrak® Indicator light may also be on.
When checking the vehicle for DTCs, the electronic brake control module (EBCM) may report C0455 and/or C0710
set as current or in history.
This condition may be caused by an increase in resistance in the circuits connecting the steering position sensor and
the EBCM due to fretting corrosion on the connector terminals.
Also, the male to female plastic connector may have excessive clearance that can cause the connector to move up
and down.
Note: Fretting corrosion looks like little dark smudges on the electrical terminals and appear where the actual
electrical contact is being made. In less severe cases it may be unable to be seen or identified without the use of a
magnifying glass.
Recommendation/Instructions
Important: DO NOT replace the steering position sensor for this condition. The terminal pins on the sensor do not
have the same concentration of deposits.
1. Disconnect the steering wheel position sensor connector.
2808092
2. Add a piece of Adhesive Back Shim Stock the width of the connector to the flat surface on the male connector.
This provides support to the connector to keep it from moving up and down.
Important: DO NOT apply an excessive amount of dielectric lubricant to the connector, as hydrolock may result
when attempting to mate the connector. Use ONLY a clean nylon brush that is dedicated to the repair of this specific
condition.
3. With a nylon bristle brush, apply dielectric lubricant to both the sensor side and the harness side of the affected
connector.
4. Reconnect the steering wheel position sensor connector and wipe away any excess lubricant that may be
present.
5. Attempt to duplicate the condition by using the following information:
– DTC Diagnostic Procedure
– Circuit/System Description
– Conditions for Running the DTC
– Conditions for Setting the DTC
– Diagnostic Aids
– Circuit/System Verification
If the condition cannot be duplicated, the repair is complete.
If the DTC resets, replace the steering angle sensor harness side connector with the service pigtail. Refer to the
Steering Angle (Position) Sensor connector end view in SI for the correct service connector part number.
Parts Information
Part Number
Description
12377900
(In Canada, use 10953529)
Dielectric Lubricant (50 gram tube)
P40100*
5/8” x 1/8” Adhesive Back Shim Stock – Kent Automotive
*This product is currently available from Kent Industries (1-888-YES-KENT).
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
2680008*
Lubricate Connector with Dielectric Lubricant
0.1-0.3 hr
*This labor operation is for bulletin use only. It will not be published in the Labor Time Guide.
Note: Any additional time for component R&R to gain access or for repair time greater than 0.3 hr must be submitted as Other
Labor Hours and requires appropriate authorization and service management approval.