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.
2003 Buick Century BaseFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Grounds
GROUNDS LOCATION
| Component | Location |
|---|---|
| G100 | Right side of engine compartment, at base of battery. |
| G101 | Front left side of radiator support. |
| G111 (3.1L VIN J) | Lower left front of engine, on transaxle stud, left of starter. |
| G111 (3.8L VIN K) | Right front of engine, on ignition control module bracket. |
| G111 (3.8L VIN 1) | Right front of engine, on ignition control module bracket. |
| G113 (3.1L VIN J) | Lower right front of engine, on transaxle stud, left of starter. |
| G113 (3.8L VIN K) | Lower right front of engine, on transaxle stud, left of starter. See Figure . |
| G113 (3.8L VIN 1) | Lower right front of engine, on transaxle stud, left of starter. See Figure . |
| G200 | Behind right side of dash compartment. See Figure . |
| G201 | Below dash, left side of steering column. |
| G203 | Below dash, right side of steering column. |
| G301 | Inside left door sill, forward of left front seat. |
| G401 | Inside rear compartment, below left side of rear window trim panel. |
| G402 | Inside rear compartment, below right side of rear window trim panel. |
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.