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 1842 (DTC INDEX)AUTOMATIC TRANSMISSION (4L680-E) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Automatic Transmission (4L680-E) DTCS
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Automatic Transmission (4L680-E) DTCS
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
AUTOMATIC TRANSMISSION - 4L80-E DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B2722 | Tow/Haul Switch Signal Circuit Shorted To Ground |
| DTC P0218 | TFT High |
| DTC P0502 | Low Vehicle Speed And There Is A High Engine Speed In A Drive Gear Range |
| DTC P0503 | Low Vehicle Speed And There Is A High Engine Speed In A Drive Gear Range |
| DTC P0706 | Vehicle Speed In The PARK Or NEUTRAL Range |
| DTC P0711 | TFT Sensor Resistance Change |
| DTC P0712 | TFT Sensor Voltage Low |
| DTC P0713 | TFT Sensor Voltage High |
| DTC P0716 | Large Change In Input Speed |
| DTC P0717 | Low Or No Input Speed During High Vehicle And High Engine Speeds |
| DTC P0719 | Open TCC/Stop Lamp Switch Circuit During Accelerations |
| DTC P0724 | Closed TCC/Stop Lamp Switch During Decelerations |
| DTC P0730 | Gear Ratio |
| DTC P0741 | High TCC Slip When The TCC Is Commanded ON |
| DTC P0742 | Low TCC Slip When The TCC Is Commanded OFF |
| DTC P0748 | PC Duty Cycle Exceeded Its Limit |
| DTC P0751 | Gear Ratio |
| DTC P0752 | Gear Ratio |
| DTC P0753 | Open Or Short In The 1-2 SS Valve Circuit Or The 1-2 SS Valve |
| DTC P0756 | Gear Ratio |
| DTC P0757 | Non Third Gear Ratio While Third Gear Is Commanded |
| DTC P0758 | Open Or Short In The 2-3 SS Valve Circuit Or The 2-3 SS Valve |
| DTC P0894 | excessive TCC Slip Speed In D4 OVERDRIVE |
| DTC P1810 | Invalid State Of The TFP Manual Valve Position Switch Circuit |
| DTC P1860 | Open Or Short In The TCC PWM Solenoid Valve Circuit Or The TCC PWM Solenoid Valve |
| DTC P1875 | Open Or Short To Ground In The 4WD Low Signal Circuit |
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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.