C0550 Code Setting and or ABS/Brake Light Coming On Intermittently - ABS brake calibration DTC EBTCM indicatorinoperative intermittent lamp light module part policy sensor stabilitrak TCS VSES

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Some customers may comment on one or more of the following concerns:

1. The Service Stability message may be displayed on the DIC (Driver Information Center).
2. The vehicle lighting systems may dim noticeably.
3. The VSES motor may come on unexpectedly.
4. The brake and Anti-Lock Brake System (ABS) telltales may come on and chime. This concern is most common in cold weather.

Inspect for Diagnostic Trouble Code (DTC) C0455 and/or C0550 set.

Update the VSES module with new software. The new software will be available in TIS version 6.5, scheduled for release on June 15, 2003. All 2004 model year trucks built prior to June 16, 2003 will also need the VSES module software update.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(03, 04 Chevrolet Suburban, Tahoe) and (03, 04 GMC Denali, Denali XL, Yukon, Yukon XL) and (03, 04 Cadillac Escalade, Escalade EXT, ESV)