GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Auto Level Control (ALC) Air Compressor

Under the vehicle, behind the LR wheelhouse

Automatic Level Control Suspension Component Views

Automatic Level Control Suspension Connector End Views

Auto Level Control (ALC) Inflator Relay

In the vehicle, behind the left rear wheelhouse

Automatic Level Control Suspension Component Views

Automatic Level Control Suspension Connector End Views

Auto Level Control (ALC) Inflator Solenoid Valve

Behind the left rear wheelhouse

Automatic Level Control Suspension Component Views

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Auto Level Control (ALC) Sensor

Mounted to the rear crossmember above the rear axle

Automatic Level Control Suspension Component Views

Automatic Level Control Suspension Connector End Views

Fuse Block

Right side of the IP, in the right front door opening

Power and Grounding Component Views

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Inflator Air Switch

Behind the left rear wheelhouse

Automatic Level Control Suspension Component Views

Automatic Level Control Suspension Connector End Views

C200 (56 cavities)

IP wiring harness to the right side of the body wiring harness, behind the right side of the IP compartment, below P100

Harness Routing Views

Inline Harness Connector End Views

C203 (56 cavities)

IP wiring harness to the left side of the body wiring harness, left side of the steering column, below P101

Harness Routing Views

Inline Harness Connector End Views

C405 (10 cavities)

Body wiring harness to the auto level control wiring harness, behind the left quarter panel, behind the left rear wheelhouse

Harness Routing Views

Inline Harness Connector End Views

C407 (6 cavities)

Auto level control wiring harness to the trailer rear wiring harness, beneath the vehicle, near P403, near the left rear wheelhouse

Harness Routing Views

Inline Harness Connector End Views

G401

Secured to the lower left D-pillar

Harness Routing Views

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P403

Behind the left wheelhouse

Harness Routing Views

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S209

IP harness, center of the IP approximately 8 cm (3 in) from the security indicator lamp breakout

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S337

Body harness, rear of the left B-pillar base approximately 8 cm (3 in) from the P401 breakout

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S441

Auto level control harness, left rear of the body approximately 24 cm (9 in) from P403

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S443

Auto level control harness, left rear of the body approximately 20 cm (8 in) from P403

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S445

Auto level control harness, left rear of the body approximately 16 cm (6 in) from P403

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