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.
2001 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Charging Systems
- Identification
- Description & Operation
- Adjustments
- Trouble Shooting
- On-Vehicle Testing
- Self-Diagnostic System
- Diagnostic Tests
- Notes
- DTC B1328: Charging Voltage High (Cavalier & SUNFIRE)
- DTC B1482: Battery Rundown Protection Circuit Low (Impala & Monte CARLO)
- DTC B1483: Battery Rundown Protection Circuit High (Impala & Monte CARLO)
- DTC B1507: High Power Control Circuit Low (Impala & Monte CARLO)
- DTC B1508: High Power Control Circuit High (Impala & Monte CARLO)
- DTC P0560: Voltage Out Of Range (Century, Grand PRIX, Impala, Intrigue, MALIBU, Monte CARLO & Regal)
- P0562: Voltage Excessively Low (ALERO, Cavalier, Grand Am & SUNFIRE)
- DTC P0563: Voltage Excessively High (ALERO, Cavalier, Grand Am & SUNFIRE)
- DTC P0620: Fault Detection Circuit Malfunction (ALERO & Grand Am)
- DTC P0620: Fault Detection Circuit Malfunction (Century, Grand PRIX, Intrigue & Regal)
- DTC P0620: Fault Detection Circuit Malfunction (Impala & Monte CARLO)
- DTC P0620: Fault Detection Circuit Malfunction (MALIBU)
- P0621: Generator Turn-On Signal Circuit High Or Low Voltage (ALERO, Cavalier, Grand Am & SUNFIRE)
- P0622: Pulse Width Modulated Signal Out Of Range (ALERO, Cavalier, Grand Am & SUNFIRE)
- DTC P1637: Output Driver Module Malfunction (Grand PRIX)
- System Tests
- Bench Testing
- Removal & Installation
- Notes
- Generator
- Removal (Intrigue)
- Installation(Intrigue)
- Removal (Alero, Grand Am 2.2L)
- Installation (Alero, Grand Am 2.2L)
- Removal ( Cavalier, Sunfire 2.2L)
- Installation (Cavalier, Sunfire 2.2L)
- Removal (S-10, Sonoma 2.2L)
- Installation (S-10, Sonoma 2.2L)
- Removal (Alero, Cavalier, Grand AM, Sunfire 2.4L)
- Installation (Alero, Cavalier, Grand AM, Sunfire 2.4L)
- Removal (Century, Grand Prix, Malibu 3.1L)
- Installation (Century, Grand Prix, Malibu 3.1L)
- Removal (Lumina 3.1L)
- Installation (Lumina 3.1L)
- Removal (Alero, GrandAm 3.4L)
- Installation (Alero, GrandAm 3.4L)
- Removal (Impala, Monte Carlo 3.4L)
- Installation (Impala, Monte Carlo 3.4L)
- Removal (Grand Prix, Regal 3.8L)
- Installation (Grand Prix, Regal 3.8L)
- Removal (Impala, Monte Carlo 3.8L)
- Installation (Impala, Monte Carlo 3.8L)
- Overhaul
- Generator Specifications
- Torque Specifications
- Wiring Diagrams
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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