GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Level Control (ALC) Inflator Air Switch
Table 2: Auto Level Control (ALC) Air Compressor
Table 3: Auto Level Control (ALC) Compressor Relay
Table 4: Automatic Level Control (ALC) Inflator Solenoid
Table 5: Auto Level Control (ALC) Sensor

Automatic Level Control (ALC) Inflator Air Switch


Object Number: 39665  Size: CH

Connector Part Information

    • 12089248
    • 4-Way F Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

ORN

840

Battery Positive Voltage

B

--

--

Not Used

C

LT BLU

1770

Ride Control Serial Data

D

WHT

1245

Automatic Level Control Inflation Timer Relay Coil Control

Auto Level Control (ALC) Air Compressor


Object Number: 697053  Size: CH

Connector Part Information

    • 12129565
    • 4-Way F Metri-Pack 280 Series Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

--

--

Ground

B

--

--

Automatic Level Control Compressor Motor Supply Voltage

C

--

--

Automatic Level Control Exhaust Solenoid Control

D

--

--

Battery Positive Voltage

Auto Level Control (ALC) Compressor Relay


Object Number: 535919  Size: CH

Connector Part Information

    • 12115039
    • 5-Way F Metri-Pack 280 Series Flexlock (BLK)

Pin

Wire Color

Circuit No.

Function

30

--

--

Battery Positive Voltage

85

--

--

Battery Positive Voltage

86

--

--

ALC Compressor Relay Control

87

--

--

ALC Compressor Supply Voltage

87A

--

--

Not Used

Automatic Level Control (ALC) Inflator Solenoid


Object Number: 684795  Size: CH

Connector Part Information

    • 12052643
    • 2-Way F Metri-Pack 150 Series, Sealed (RED)

Pin

Wire Color

Circuit No.

Function

A

--

--

Battery Positive Voltage

B

--

--

Automatic Level Control (ALC) Inflator Relay Coil Control

Auto Level Control (ALC) Sensor


Object Number: 831368  Size: CH

Connector Part Information

    • 15326836
    • 8-Way F GT 150 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

320

Automatic Level Control Exhaust Solenoid Control

B

YEL

321

Automatic Level Control Relay Coil Supply Voltage

C

BLK/WHT

151

Ground

D

YEL

843

Accessory Voltage

E

LT BLU

1770

Ride Control Serial Data

F

WHT

837

Automatic Level Control Inflator Relay Coil Control

G

WHT

1245

Automatic Level Control Inflation Timer Relay Coil Control

H

ORN

840

Battery Positive Voltage