Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2004AVALANCHE 2500 2WD V8-8.1L VIN GREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTABS/TCS - SERVICE STABILITY MESSAGE/DTC C0550 SET
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN G
ABS/TCS - Service Stability Message/DTC C0550 Set
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN GSECTION ABS/TCS - Service Stability Message/DTC C0550 Set
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.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
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.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.