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.
2003 Chevrolet TrailBlazer 4.2 S, 4WDFACTORY OEM SERVICE PROCEDURE
Automatic Transmission (4L60-E/4L65-E) DTCS - 5.3L
Automatic Transmission (4L60-E/4L65-E) 5.3L DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC P0218 (5.3L) | Transmission Fluid Overtemperature |
| DTC P0502 (5.3L) | Vehicle Speed Sensor (VSS) Circuit Low Input |
| DTC P0503 (5.3L) | Vehicle Speed Sensor (VSS) Circuit Intermittent |
| DTC P0706 (5.3L) | Transmission Range (TR) Switch Circuit |
| DTC P0711 (5.3L) | TFT Sensor Circuit Range/Performance |
| DTC P0712 (5.3L) | Transmission Fluid Temperature (TFT) Sensor Circuit Low Input |
| DTC P0713 (5.3L) | Transmission Fluid Temperature (TFT) Sensor Circuit High Input |
| DTC P0719 (5.3L) | Brake Switch Circuit Low Input |
| DTC P0724 (5.3L) | Brake Switch Circuit High Input |
| DTC P0740 (5.3L) | TCC Enable Solenoid Circuit Electrical |
| DTC P0741 (5.3L) | Torque Converter Clutch (TCC) System-Stuck Off |
| DTC P0742 (5.3L) | TCC System Stuck On |
| DTC P0748 (5.3L) | Pressure Control Solenoid Circuit Electrical |
| DTC P0751 (5.3L) | 1-2 Shift Solenoid Valve Performance |
| DTC P0752 (5.3L) | 1-2 Shift Solenoid (SS) Valve Performance - No Second Or Third Gear |
| DTC P0753 (5.3L) | 1-2 Shift Solenoid Circuit Electrical |
| DTC P0756 (5.3L) | 2-3 Shift Solenoid Valve Performance |
| DTC P0757 (5.3L) | 2-3 Shift Solenoid (SS) Valve Performance - No Third Or Fourth Gear |
| DTC P0758 (5.3L) | 2-3 Shift Solenoid Circuit Electrical |
| DTC P0785 (5.3L) | 3-2 Shift Solenoid Circuit Electrical |
| DTC P0894 (5.3L) | Transmission Component Slipping |
| DTC P1810 (5.3L) | TFP Valve Position Switch Circuit |
| DTC P1860 (5.3L) | TCC PWM Solenoid Circuit Electrical |
| DTC P1875 (5.3L) | Four Wheel Drive (4WD) Low Switch Circuit |
Factory Service Tools
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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.
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