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
Automatic Transmission Shift Lock Control Connector End Views
A/T Shift Lock Control Solenoid Connector End Views (Century)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | DK GRN/ WHT | 1135 | A/T Shift Lock Control Solenoid Supply Voltage |
| B | BLK | 150 | Ground |
A/T Shift Lock Control Switch Connector End Views (Regal)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | ORN/BLK | 434 | Neutral Safety Switch Signal |
| B | PNK | 1439 | Ignition 1 Voltage |
| C | LT BLU | 1134 | Ignition Lock Cylinder Control Actuator Signal |
| D | - | - | Not Used |
| E | DK GRN/WHT | 1135 | A/T Shift Lock Control Solenoid Supply Voltage |
| F | PPL | 1600 | Ignition 0 Voltage |
Brake to Shift Relay Connector End Views
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A1 | PNK | 1439 | Ignition 1 Voltage |
| PNK | 1439 | Ignition 1 Voltage (Regal) | |
| A2 | ORN/BLK | 434 | Neutral Safety Switch Signal |
| B1-B2 | - | - | Not Used |
| C1 | BLK | 1550 | Ground |
| C2 | TAN/WHT | 816 | A/T Shift Lock Solenoid Supply Voltage |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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