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 Buick Regal LSFACTORY OEM SERVICE PROCEDURE
Component Locations
COMPONENT LOCATIONS
| Component | Location |
|---|---|
| Express Down Module | Part Of Left Front Window Switch. See Fig 1. |
| Front Window Regulator Motor | In Center Of Front Door. See Fig 2. |
| Fuse Block | Right Side Of Instrument Panel, In Right Front Door Opening. |
| Left Front Window Switch | In Center Of Left Front Door Panel. See Fig 1 |
| Right Front Window Switch | In Center Of Right Front Door Panel. |
| Rear Window Regulator Motor | In Center Of Rear Door. |
| Rear Window Switch | In Center Of Rear Door Panel. |
| C200 (56 Cavities) | In Instrument Panel Wiring Harness To Body Wiring Harness, Behind Right Side Of Instrument Panel, Near Shroud. See Fig 3. |
| C301 (16 Cavities) | In Body Wiring Harness To Left Front Door Wiring Harness, Behind Trim At Base Of A-Pillar. See Fig 4. |
| C302 (16 Cavities) | In Body Wiring Harness To Right Front Door Wiring Harness, Behind Trim At Base Of A-Pillar. See Fig 5. |
| C351 (10 Cavities) | In Body Wiring Harness To Right Rear Door Wiring Harness, In B-Pillar. See Fig 4. |
| C352 (10 Cavities) | In Body Wiring Harness To Right Rear Door Wiring Harness, In B-Pillar. See Fig 5. |
| G201 | Below Instrument Panel To Left Side Of Steering Column |
| G203 | Below Instrument Panel, To Right Side Of Steering Column |
| G301 | Inside Left Door Sill, Forward Of Left Front Seat. See Fig 4. |
| G302 | In Right Door Sill, Forward Of Right Front Seat |
| P500 | At Left A-Pillar. See Fig 2. |
| P600 | At Right A-Pillar |
| P700 | At Left B-Pillar. See Fig 6. |
| P800 | At Right B-Pillar. See Fig 6. |
| S307 | In Body Wiring Harness, On Floor Under Driver's Seat, Approx. 11" From C311 Breakout. |
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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