forgot there are a couple tsb's on this
Bulletin No.: 05-05-25-008
Date: October 05, 2005
TECHNICAL
Subject:
Service Stabilitrak(R) Message or Intermittent Stabilitrak(R) Activation During Normal Driving, Diagnostic Trouble Code (DTC) C0455 (Inspect/Repair Steering Wheel Position Sensor (SWPS) Connector and Reprogram Electronic Brake Control Module (EBCM))
Models:
2004-2006 Cadillac Escalade Models
2004-2006 Chevrolet Avalanche, Suburban, Tahoe
2004-2006 GMC Yukon Models
with Control, Active Brake (RPO JL4)
Condition
Some customers may comment on a Service Stabilitrak(R) message or intermittent Stabilitrak(R) activation during normal driving.
When interrogating with the Tech 2(R), the technician may find a DTC C0455.
Cause
There are multiple possible causes for this issue. This bulletin will address the two most likely causes.
^ A bent terminal or poor connection at the SWPS may be one possible cause.
^ The vehicle stability enhancement system (VSES) electronic brake control module (EBCM) calibration may be the other possible cause.
Correction
1. Remove the SWPS connector located at the base of the STRG column.
2. Inspect the SWPS connector terminals for bent of loose terminals.
3. Inspect the SWPS terminals for bent or loose terminals.
Important:
DO NOT replace the SWPS or connector if bent or loose terminals are found.
4. If either the SWPS terminals or SWPS connector terminals are bent or loose, repair the terminals.
5. Reprogram the VSES EBCM with TIS version 9.0 released on 9/04/05 or later.
Warranty Information
Bulletin No.: 04-08-49-006C
Date: January 05, 2005
TECHNICAL
Subject:
Service Stability Message Displayed, DTC C0550 Set (Reprogram EBCM)
Models:
2004-2005 Cadillac Escalade, Escalade ESV, Escalade EXT
2004-2005 Chevrolet Avalanche, Suburban, Tahoe
2004-2005 GMC Yukon, Yukon Denali, Yukon XL
Supercede:
This bulletin is being revised to correct the Subject line. Please discard Corporate Bulletin Number 04-08-49-006B (Section 08 - Body and Accessories).
Condition
Some customers may comment that while driving downhill and making a turn, the Service Stability message will display in the Driver Information Center (DIC). This will occur prior to ABS activation and once stopped, the message will go off.
Upon investigation, the technician may find DTC C0550 stored in history.
Cause
The cause of this condition may be that the "Long Accel Gain" parameters in the EBCM are sensitive to certain driving conditions.
Correction
Technicians are to reprogram the EBCM with an updated software calibration. This new service calibration was released with TIS satellite data update version 9.5 available September 20, 2004. As always, make sure your TECH 2(R) is updated with the latest software version.
Both involve reprogramming of the computer
Apr 19, 2015 at 9:08 AM
