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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1841 (DTC INDEX)AUTOMATIC TRANSMISSION (ALLISON) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Automatic Transmission (ALLISON) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Automatic Transmission (ALLISON) 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 |
| P0500 | Vehicle Speed Sensor Circuit |
| P0561 | Unrealistic Variations In Vehicle System Voltage |
| P0562 | System Voltage Low |
| P0563 | System Voltage High |
| P0700 | MIL Illumination Requested |
| P0701 | Transmission Control System Performance |
| P0703 | Brake Switch Circuit |
| P0708 | Transmission Range Sensor Circuit High Input |
| P0711 | Transmission Fluid Temperature Sensor Circuit - Performance |
| P0712 | Transmission Fluid Temperature Sensor Circuit - Low Input (High Temperature) |
| P0713 | Transmission Fluid Temperature Sensor Circuit - High Input (Low Temperature) |
| P0716 | Turbine Speed Sensor Circuit - Performance |
| P0717 | Turbine Speed Sensor Circuit - No Signal |
| P0721 | Output Speed Sensor Circuit - Performance |
| P0722 | Output Speed Sensor Circuit - No Signal |
| P0726 | Engine Speed Sensor Circuit - Performance |
| P0727 | Engine Speed Sensor Circuit - No Signal |
| P0731 2002 | Incorrect 1st Gear Ratio |
| P0732 2002 | Incorrect 2nd Gear Ratio |
| P0733 2002 | Incorrect 3rd Gear Ratio |
| P0734 2002 | Incorrect 4th Gear Ratio |
| P0735 2002 | Incorrect 5th Gear Ratio |
| P0736 | Incorrect Reverse Ratio |
| P0741 | Torque Converter Clutch System Stuck Off |
| P0742 | Torque Converter Clutch System Stuck On |
| P0743 2002 | Torque Converter Clutch - Electrical |
| P0746 2002 | Solenoid "A" Controlled Clutch Stuck Off |
| P0747 2002 | Solenoid "A" Controlled Clutch Stuck On |
| P0748 | Pressure Control Solenoid "A" Electrical |
| P0763 | Shift Solenoid "C" Electrical |
| P0768 | Shift Solenoid "D" Electrical |
| P0773 | Shift Solenoid "E" Electrical |
| P0776 2002 | Solenoid "B" Controlled Clutch Stuck Off |
| P0777 2002 | Solenoid "B" Controlled Clutch Stuck On |
| P0778 | Pressure Control Solenoid "B" Electrical |
| P0836 2002 | 4-Wheel Drive Low Switch Circuit Malfunction |
| P0840 | Pressure Switch Solenoid "C" Circuit Malfunction |
| P0841 | Pressure Switch Solenoid "C" Circuit Stuck Open |
| P0842 | Pressure Switch Solenoid "C" Circuit Stuck Closed |
| P0843 | Pressure Switch Solenoid "C" Circuit High |
| P0845 | Pressure Switch Solenoid "D" Circuit Malfunction |
| P0846 | Pressure Switch Solenoid "D" Circuit Stuck Open |
| P0847 | Pressure Switch Solenoid "D" Circuit Stuck Closed |
| P0848 | Pressure Switch Solenoid "D" Circuit High |
| P0870 | Pressure Switch "E" Circuit Malfunction |
| P0871 | Pressure Switch Solenoid "E" Circuit Stuck Open |
| P0872 | Pressure Switch Solenoid "E" Circuit Stuck Closed |
| P0873 | Pressure Switch Solenoid "E" Circuit High |
| P0875 | Reverse Pressure Switch Circuit Malfunction |
| P0876 | Reverse Pressure Switch Circuit Stuck Open |
| P0880 | TCM Power Input Signal |
| P1571 | TCM Torque Request Circuit (8.1L) |
| P1688 | Unmanaged Engine Torque Delivered To TCM |
| P1709 | Pressure Switch "E" Circuit Malfunction |
| P1710 | Pressure Switch Solenoid "E" Circuit Stuck Open |
| P1711 | Pressure Switch Solenoid "E" Circuit Stuck Closed |
| P1712 | Pressure Switch Solenoid "E" Circuit High |
| P1713 | Reverse Pressure Switch Circuit Malfunction |
| P1714 | Reverse Pressure Switch Circuit Stuck Open |
| P1720 | Solenoid "A" Controlled Clutch Stuck Off |
| P1721 | Solenoid "B" Controlled Clutch Stuck Off |
| P1723 | Solenoid "A" Controlled Clutch Stuck On |
| P1724 | Solenoid "B" Controlled Clutch Stuck On |
| P1760 | TCM Supply Voltage |
| P1779 | Engine Torque Delivered To TCM |
| P1860 | Torque Converter Clutch - Electrical |
| P1875 | 4-Wheel Drive Low Switch Circuit |
| U2105 2002 | CAN Bus PCM Error |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.