GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Level Control (ALC) Compressor Relay
Table 2: Automatic Level Control (ALC) Air Compressor

Automatic Level Control (ALC) Compressor Relay


Object Number: 535912  Size: CH

Connector Part Information

    • 12129716
    • 4-Way F Metri-Pack 280 Series (GY)

Pin

Wire Color

Circuit No.

Function

30

RD

742

Battery Positive Voltage

85

BN

541

Ignition 3 Voltage

86

L-BU

2248

Real Time Damping Compressor Relay Control

87

L-BU

1112

Damping Relay Coil Control

Automatic Level Control (ALC) Air Compressor


Object Number: 655687  Size: CH

Connector Part Information

    • 12110751
    • 7-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1112

Damping Relay Coil Control

B

D-BU

2249

Exhaust Solenoid Control

C

BK

407

Low Reference

D

TN

2252

Pressure Sensor Signal

E

GY

416

5-Volt Reference

F

OG

2440

Battery Positive Voltage

G

BK

1750

Ground