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 584 (ANTI-LOCK BRAKE SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC TROUBLE CODE (DTC) LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Diagnostic Trouble Code (DTC) List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Diagnostic Trouble Code (DTC) List
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Definition |
|---|---|
| B2747 | Traction Control Switch Circuit Low |
| C1214 | Electronic Brake Control Relay Contact Circuit Open |
| C1216 | EBCM Commanded Pressure Release Is Too Long |
| C1217 | Pump Motor Shorted To Ground |
| C1218 | Pump Motor Circuit Short To Voltage Or Motor Ground Open |
| C1221 | LF Wheel Speed Sensor Input Signal Equals Zero |
| C1222 | RF Wheel Speed Sensor Input Signal Equals Zero |
| C1223 | LR Wheel Speed Sensor Input Signal Equals Zero |
| C1224 | RR Wheel Speed Sensor Input Signal Equals Zero |
| C1225 | LF Excessive Wheel Speed Variation |
| C1226 | RF Excessive Wheel Speed Variation |
| C1227 | LR Excessive Wheel Speed Variation |
| C1228 | RR Excessive Wheel Speed Variation |
| C1229 | Simultaneous Drop Out Of Front Wheel Speed Signals |
| C1232 | LF Wheel Speed Circuit Open Or Shorted |
| C1233 | RF Wheel Speed Circuit Open Or Shorted |
| C1234 | LR Wheel Speed Circuit Open Or Shorted |
| C1235 | RR Wheel Speed Circuit Open Or Shorted |
| C1236 | Low System Supply Voltage |
| C1237 | High System Voltage |
| C1238 | Brake Temp Status Temporarily Exceeded |
| C1242 | BPMV Pump Motor Ground Circuit Open |
| C1243 | BPMV Pump Motor Stalled |
| C1248 | DRP Disabled |
| C1254 | Abnormal Shutdown Detected |
| C1255 | EBTCM Internal Malfunction (ABS/TCS/ICCS Disabled) |
| C1256 | EBTCM Internal Malfunction |
| C1261 | LF Inlet Valve Solenoid Malfunction |
| C1262 | LF Outlet Valve Solenoid |
| C1263 | RF Inlet Valve Solenoid |
| C1264 | RF Outlet Valve Solenoid |
| C1265 | LR Inlet Valve Solenoid |
| C1266 | LR Outlet Valve Solenoid |
| C1267 | RR Inlet Valve Solenoid |
| C1268 | RR Outlet Valve Solenoid |
| C1269 | VCM/4WAL Voltage Low During ABS Stop |
| C1271 | LF TCS Master Cylinder Isolation Valve |
| C1272 | LF TCS Prime Valve |
| C1273 | RF TCS Master Cylinder Isolation Valve |
| C1274 | RF TCS Prime Valve |
| C1275 | PCM Serial Data Malfunction |
| C1276 | Delivered Torque Signal Malfunction |
| C1277 | Requested Torque Signal Circuit Malfunction |
| C1278 | TCS Temporarily Inhibited By PCM (TCS/ETS Only) |
| C1291 | Open Brake Lamp Switch Contacts During Deceleration |
| C1294 | Brake Lamp Switch Circuit Always Active |
| C1295 | Brake Light Switch Circuit Open |
| P1571 | Traction Control Desired Torque Signal |
| P1644 | Driver 1 Line 4 |
| P1689 | TCS Delivered Torque Control Circuit |
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.