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.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 959 (ANTILOCK BRAKE SYSTEM AND TRACTION CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Scan Tool Data List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Scan Tool Data List
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition ON, Engine OFF and Brake released | |||
| 4WD Status | ABS | Two wheel drive/Four wheel drive | Varies |
| ABS Lamp Command | ABS | On/Off | Off |
| ABS Pump Motor | ABS | On/Off | Off |
| ABS Relay Command | ABS | On/Off | ON |
| ABS Stop State |
|
On/Off | Off |
| Brake Switch Status |
|
On/Off | Off |
| Brake Warning Lamp Command | ABS | On/Off | Off |
| Diff. Pressure/Fluid Level Switch | ABS | Ok/Low | Ok |
| Delivered Torque | Traction Assist | % | 35% |
| DRP Active | ABS | Yes/No | No |
| Left Front Wheel Speed |
|
km/h or mph | 5 km/h/3 mph |
| LF Dump Valve Command | ABS | On/Off | Off |
| LF Dump Valve Feedback | ABS | On/Off | Off |
| LF ISO Valve Command | ABS | On/Off | Off |
| LF ISO Valve Feedback | ABS | On/Off | Off |
| Low Traction Lamp Command | Traction Assist | On/Off | Off |
| Rear Dump Valve Command | ABS | On/Off | Off |
| Rear Dump Valve Feedback | ABS | On/Off | Off |
| Rear ISO Valve Command | ABS | On/Off | Off |
| Rear ISO Valve Feedback | ABS | On/Off | Off |
| Rear Wheel Speed |
|
km/h or mph | 5 km/h/3 mph |
| Requested Torque | Traction Assist | % | 91% |
| RF Dump Valve Command | ABS | On/Off | Off |
| RF Dump Valve Feedback | ABS | On/Off | Off |
| RF ISO Valve Command | ABS | On/Off | Off |
| RF ISO Valve Feedback | ABS | On/Off | Off |
| Right Front Wheel Speed |
|
km/h or mph | 5 km/h/3 mph |
| Traction Control Active | Traction Assist | Yes/No | No |
| Traction Control Enabled | Traction Assist | Yes/No | Varies |
| Traction Control Equipped | Traction Assist | Yes/No | Yes |
| Traction Control Slip | Traction Assist | Yes/No | No |
| Traction Off Lamp Command | Traction Assist | On/Off | Off |
RENDER: 1.0x
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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.