GM Service Manual Online
For 1990-2009 cars only
Table 1: Air Brake Relay
Table 2: Air Brake Dryer
Table 3: Low Air Pressure Switch-Primary
Table 4: Low Air Pressure Switch-Secondary
Table 5: Park Brake Switch

Air Brake Relay


Object Number: 535912  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No

Function

86

BN

441

Ignition 3 Voltage

30

RD

442

Battery Positive Voltage

87

PPL

2661

ABS Switch Signal

85

BK

250

Ground

Air Brake Dryer


Object Number: 646148  Size: CH

Connector Part Information

    • 12020599
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No

Function

A

BN

541

Ignition 3 Voltage

B

BK

350

Ground

Low Air Pressure Switch-Primary


Object Number: 876326  Size: CH

Connector Part Information

    • 12065402
    • 2-Way F Metri-Pack 280 Series (BN)

Pin

Wire Color

Circuit No

Function

C

BK

350

Ground

D

D-GN/WH

2662

Low Air Pressure Switch Signal

Low Air Pressure Switch-Secondary


Object Number: 876326  Size: CH

Connector Part Information

    • 12065402
    • 2-Way F Metri-Pack 280 Series (BN)

Pin

Wire Color

Circuit No

Function

C

BK

350

Ground

D

D-GN/WH

2662

Low Air Pressure Switch Signal

Park Brake Switch


Object Number: 856501  Size: CH

Connector Part Information

    • 02977373
    • 2-Way F (GY)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1134

Park Brake Switch Signal

B

BK

750

Ground