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.
2007 Chevrolet Uplander Base, 3.9 WFACTORY OEM SERVICE PROCEDURE
Automatic Level Control (ALC) Compressor Connector End View (G67)
Connector Part Information
Connector Part Information
|
Terminal Part Information
|
Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A | RD/WH | 140 | Battery Positive Voltage |
| B | WH | 320 | Automatic Level Control Exhaust Solenoid Control |
| C | RD/WH | 140 | Battery Positive Voltage |
| D | YE | 321 | Automatic Level Control Relay Control |
| E | RD/WH | 140 | Battery Positive Voltage |
| F | - | - | Not Used |
| G | BK | 350 | Ground |
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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