GM Service Manual Online
For 1990-2009 cars only
Table 1: Front Axle Actuator
Table 2: Propshaft Speed Sensor - Front
Table 3: Propshaft Speed Sensor - Rear
Table 4: Transfer Case Encoder Motor
Table 5: Transfer Case Shift Control Module C1
Table 6: Transfer Case Shift Control Module C2
Table 7: Transfer Case Shift Control Module C3
Table 8: Transfer Case Shift Control Switch

Front Axle Actuator


Object Number: 646430  Size: CH

Connector Part Information

    • 15326815
    • 4-Way F GT 150 Sealed 4.0 (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1296

Axle Actuator - Control

B

BK

350

Ground

C

BK/WH

1695

Axle Switch Signal

D

BN

241

Ignition 3 Voltage

Propshaft Speed Sensor - Front


Object Number: 666646  Size: CH

Connector Part Information

    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

YE

400

Signal High - Front

2

PU

401

Signal Low - Front

Propshaft Speed Sensor - Rear


Object Number: 666646  Size: CH

Connector Part Information

    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

L-BU

2221

Signal High - Rear

2

D-GN

2222

Signal Low - Rear

Transfer Case Encoder Motor


Object Number: 646372  Size: CH

Connector Part Information

    • 15326654
    • 8-Way F GT 280 Sealed 5.8 (BK)

Pin

Wire Color

Circuit No.

Function

A

GY

605

5-Volt Reference

B

BN/WH

1555

Encoder Signal

C

BK/WH

1554

Encoder Low Reference

D

BK

1552

Motor Control A

E

RD

1553

Motor Control B

F

OG

1640

Battery Positive Voltage

G

TN

1569

Lock Solenoid Control

H

--

--

Not Used

Transfer Case Shift Control Module C1


Object Number: 73152  Size: CH

Connector Part Information

    • 12084944
    • 16-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

A1

D-GN/WH

1133

ATC Class 2 Serial Data

A2

L-BU

1296

Axle Actuator - Control

A3

PK

1561

AWD Indicator Control

A4

PU/WH

1565

4 LO Indicator - Control

A5

TN/BK

1566

4 HI Indicator - Control

A6

L-BU

1693

Switch Signal

A7

BK/WH

1554

Encoder Low Reference

A8

--

--

Not Used

B1

--

--

Not Used

B2

TN

1569

Lock Solenoid Control

B3

L-GN/BK

1563

2 HI Indicator - Control

B4

BN

1560

Neutral Indicator Control

B5

GY/BK

1694

4WD Low Signal

B6

BN/WH

1555

Encoder Signal

B7

--

--

Not Used

B8

BK/WH

751

Ground

Transfer Case Shift Control Module C2


Object Number: 73152  Size: CH

Connector Part Information

    • 12084945
    • 16-Way F Micro-Pack 100 Series (GY)

Pin

Wire Color

Circuit No.

Function

A1

PU

401

Signal Low - Front

A2

YE

400

Signal High - Front

A3-A7

--

--

Not Used

A8

GY

605

5-Volt Reference

B1

L-BU

2221

Signal High - Rear

B2

D-GN

2222

Signal Low - Rear

B3-B5

--

--

Not Used

B6

BK/WH

1695

Axle Switch Signal

B7

--

--

Not Used

B8

GY

596

5-Volt Reference

Transfer Case Shift Control Module C3


Object Number: 62450  Size: CH

Connector Part Information

    • 12052856
    • 4-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

2250

Ground

B

OG

1640

Battery Positive Voltage

C

BK

1552

Motor Control A

D

RD

1553

Motor Control B

Transfer Case Shift Control Switch


Object Number: 647976  Size: CH

Connector Part Information

    • 15332161
    • 12-Way F GT 150 (BK)

Pin

Wire Color

Circuit No.

Function

A

PU/WH

1565

4 LO Indicator - Control

B

PU/WH

1382

LED Dimming Signal

C

BN/WH

230

Instrument Panel Lamps Dimming Control

D

BK

2250

Ground

E

TN/BK

1566

4 HI Indicator - Control

F

PK

1561

AWD Indicator Control

G

BN

1560

Neutral Indicator Control

H

BN

241

Ignition 3 Voltage

J

GY

596

5-Volt Reference

K

--

--

Not Used

L

L-GN/BK

1563

2 HI Indicator - Control

M

L-BU

1693

Switch Signal