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.
1999 Chevrolet Chevy Express G1500, Van Passenger, 5.0 MFACTORY OEM SERVICE PROCEDURE
Automatic Transmission (4L60-E) DTCS
AUTOMATIC TRANSMISSION (4L60-E) (LIGHT TRUCKS AND VANS) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
| P0218 | TRANSMISSION FLUID OVERTEMPERATURE |
| P0502 | VEHICLE SPEED SENSOR CIRCUIT (LOW INPUT) |
| P0503 | VEHICLE SPEED SENSOR CIRCUIT (INTERMITTENT) |
| P0711 | TRANS. FLUID TEMPERATURE (TFT) SENSOR CIRCUIT (RANGE/PERFORMANCE) |
| P0712 | TRANS. FLUID TEMPERATURE (TFT) SENSOR CIRCUIT (LOW INPUT) |
| P0713 | TRANS. FLUID TEMPERATURE (TFT) SENSOR CIRCUIT (HIGH INPUT) |
| P0719 | BRAKE SWITCH CIRCUIT LOW INPUT (SWITCH STUCK ON) |
| P0724 | BRAKE SWITCH CIRCUIT LOW INPUT (SWITCH STUCK OFF) |
| P0740 | TCC SOLENOID ELECTRICAL MALFUNCTION |
| P0742 | TCC CIRCUIT INOPERATIVE (STUCK ON) |
| P0748 | PRESSURE CONTROL SOLENOID (PCS) ELECTRICAL MALFUNCTION |
| P0751 | 1-2 SHIFT SOLENOID ("A") PERFORMANCE MALFUNCTION |
| P0753 | 1-2 SHIFT SOLENOID ("A") ELECTRICAL MALFUNCTION |
| P0756 | 2-3 SHIFT SOLENOID ("B") PERFORMANCE MALFUNCTION |
| P0758 | 2-3 SHIFT SOLENOID ("B") ELECTRICAL MALFUNCTION |
| P0785 | 3-2 SHIFT SOLENOID ELECTRICAL MALFUNCTION |
| P1810 | TRANSMISSION FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH ASSEMBLY MALFUNCTION |
| P1860 | TCC PWM SOLENOID ELECTRICAL MALFUNCTION |
| P1870 | TRANSMISSION COMPONENT SLIPPING |
| P1875 | 4WD LOW CIRCUIT MALFUNCTION |
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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