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 (GRY)

Pin

Wire Color

Circuit No.

Function

30

RED

742

Battery Positive Voltage

85

BRN

541

Ignition 3 Voltage

86

LT BLU

2248

Real Time Damping Compressor Relay Control

87

LT BLU

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 (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

1112

Damping Relay Coil Control

B

DK BLU

2249

Exhaust Solenoid Control

C

BLK

407

Low Reference

D

TAN

2252

Pressure Sensor Signal

E

GRY

416

5 Volt Reference

F

ORN

2440

Battery Positive Voltage

G

BLK

1750

Ground