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 MANUALSCHEVROLET2002SILVERADO 1500 HD, RWDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION DIAGNOSIS - 4L80-E
2002 Chevrolet Silverado 1500 HD, RWD
Automatic Transmission Diagnosis - 4L80-E
2002 Chevrolet Silverado 1500 HD, RWDSECTION Automatic Transmission Diagnosis - 4L80-E
- Application
- Identification
- Description & Operation
- Introduction
- Adapt Function
- Transmission Components & Systems
- Electronic Components
- Notes
- Torque Converter Clutch Solenoid Valve
- Pressure Control Solenoid Valve
- 1-2 Shift Solenoid Valve
- 2-3 Shift Solenoid Valve
- Transmission Fluid Pressure Manual Valve Position Switch Assembly
- Input Speed & Output Speed Sensors
- Transmission Fluid Temperature Sensor Assembly
- Transmission Range Switch
- Transmission 20-Way In-Line Electrical Connector
- Powertrain Control Module
- Limp-In Mode
- Electronic Control System
- Shift Interlock System
- Trouble Shooting
- Performance Tests
- Self-Diagnostic System
- Diagnostic Tests
- DTC B2722: Transmission Preference Switch Circuit - Low Input
- DTC P0218: Transmission Fluid OVERTEMPERATURE
- DTC P0502: VSS Circuit - Low Input
- DTC P0503: VSS Circuit - Intermittent
- DTC P0706: Transmission Range Switch Circuit - Low Input
- DTC P0711: Transmission Fluid Temperature Sensor Circuit - Range/Performance
- DTC P0712: Transmission Fluid Temperature Sensor Circuit - Low Input
- DTC P0713: Transmission Fluid Temperature Sensor Circuit - High Input
- DTC P0716: Input Speed Sensor Circuit - Intermittent
- DTC P0717: Input Speed Sensor Circuit - Low Input
- DTC P0719: Brake Switch Circuit - Low Input
- DTC P0724: Brake Switch Circuit - High Input
- DTC P0730: Incorrect Gear Ratio
- DTC P0741: TCC System - Stuck Off
- DTC P0742: TCC System Stuck On
- DTC P0748: Pc Solenoid Circuit - Electrical Malfunction
- DTC P0751: 1-2 Shift Solenoid Valve - Performance
- DTC P0752: 1-2 Shift Solenoid Valve - Performance
- DTC P0753: 1-2 Shift Solenoid Valve - Electrical Malfunction
- DTC P0756: 2-3 Shift Solenoid Valve - Performance
- DTC P0757: 2-3 Shift Solenoid Valve - Performance
- DTC P0758: 2-3 Shift Solenoid Valve - Electrical Malfunction
- DTC P1810: TFP Manual Valve Position Switch Assembly - Circuit Malfunction
- DTC P1860: TCC PWM Solenoid Circuit - Electrical Malfunction
- DTC P1870: Transmission Component Slipping
- DTC P1875: 4WD Low Switch Circuit - Electrical Malfunction
- Symptom Tests
- Component Tests
- Removal & Installation
- Torque Specifications
- Electronic Component Specifications
- Connector Identification
- Wiring Diagrams
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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.