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 1841 (DTC INDEX)ANTI-LOCK BRAKE DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Anti-Lock Brake DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Anti-Lock Brake DTCS
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
ANTI-LOCK BRAKE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC C0221, C0222, C0223, C0225, C0226, C0227 | Wheel Speed Sensor Fault |
| DTC C0229 | Drop Out of Front Wheel Speed Signals |
| DTC C0235, C0236, C0237, P1504 | Rear Wheel Speed Signal Fault & Vehicle Speed Output Circuit |
| DTC C0238 | Wheel Speed Mismatch |
| DTC C0241, C0242, C0245, C0246, C0251, C0252, C0253 & C0254 | EBCM Control Valve Circuit Malfunction |
| DTC C0265, C0266 | EBCM Relay Circuit |
| DTC C0267, C0268 | Pump Motor Circuit Open/Shorted |
| DTC C0269, C0274 | Excessive Dump/Isolation Time |
| DTC C0271, C0274, C0273, C0284 | EBCM Malfunction |
| DTC C0279 | Powertrain Configuration Not Valid |
| DTC C0281 | Brake Switch Circuit |
| DTC C0283 (w/NW7, Traction Control) | Traction Switch Shorted to Ground |
| DTC C0287, P1644, P1689 | Delivered Torque Circuit & Traction Control Delivered Torque Output Circuit |
| DTC C0290, C0292 | Lost Communications With PCM |
| DTC C0297 | Powertrain Configuration Data Not Received |
| DTC C0298, P1571 | Powertrain Indicated Traction Control Malfunction & Traction Control Torque Request Circuit |
RENDER: 1.0x
NO RELATED
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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.