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 DIAGNOSISELECTRICALCHARGING SYSTEMSCHARGING SYSTEM
2002 Chevrolet Silverado 1500 HD, RWD
Charging System
2002 Chevrolet Silverado 1500 HD, RWDSECTION Charging System
- Description & Operation
- Component Locations
- Adjustments
- Trouble Shooting
- Self Diagnostic System
- Diagnostic Tests
- DTC P0562: Low System Voltage
- DTC P0563: High System Voltage
- DTC P0615: Improper Voltage Level On The Output Circuit That Controls The Starter Relay
- DTC P0621: High Generator Turn On Signal
- DTC P0622: Improper Pulse Width Modulated Signal (Gasoline Engine)
- DTC P0622: Improper Pulse Width Modulated Signal (Diesel Engine)
- DTC P1637: Generator Turn-On Signal Circuit Voltage Out Of Range
- DTC P1638: Pulse Width Modulation Signal Out Of Range
- System Tests
- On-Vehicle Testing
- Bench Testing
- Removal & Installation
- Overhaul
- Generator Specifications
- Torque Specifications
- Wiring Diagrams
RENDER: 1.0x
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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.