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)AUTOMATIC TRANSMISSION (4L60-E) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Automatic Transmission (4L60-E) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Automatic Transmission (4L60-E) 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.
DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P0218 | Transmission Fluid Overtemperature |
| P0502 | VSS Circuit - Low Input |
| P0503 | VSS Circuit - Performance |
| P0705 | Transmission Range Sensor Circuit |
| P0706 | Transmission Range Switch Performance |
| P0711 | TFT Sensor Circuit Out of Range |
| P0712 | TFT Sensor Circuit Low Voltage |
| P0713 | TFT Sensor Circuit High Voltage |
| P0719 | Brake Switch Circuit Low Voltage |
| P0724 | Brake Switch Circuit High Voltage |
| P0740 | Torque Converter Clutch Circuit |
| P0741 | TCC Circuit Performance or Stuck Off |
| P0742 | Torque Converter Clutch Circuit Stuck On |
| P0748 | Pressure Control Solenoid Circuit - Electrical Malfunction |
| P0751 | 1-2 Shift Solenoid Performance Or Stuck Off |
| P0752 | 1-2 Shift Solenoid Stuck On |
| P0753 | 1-2 Shift Solenoid Circuit - Electrical Malfunction |
| P0756 | 2-3 Shift Solenoid Performance Or Stuck Off |
| P0757 | 2-3 Shift Solenoid Stuck On |
| P0758 | 2-3 Shift Solenoid Circuit - Electrical Malfunction |
| P0785 | 3-2 Shift Solenoid Circuit - Electrical Malfunction |
| P1810 | TFP Manual Valve Position Switch - Circuit Malfunction |
| P1860 | TCC PWM Solenoid Electrical Malfunction |
| P1870 | Transmission Component Slipping |
| P1875 | 4WD Low Switch Circuit - Electrical Malfunction |
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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.