GM Service Manual Online
For 1990-2009 cars only
Table 1: Four Wheel Drive Indicator Switch
Table 2: Front Drive Axle Clutch Solenoid
Table 3: Transfer Case Shift Control Module, (C1)
Table 4: Transfer Case Shift Control Module, C2
Table 5: Transfer Case Shift Control Switch, C1
Table 6: Transfer Case Shift Control Switch, C2
Table 7: Transfer Case Encoder Motor, C1
Table 8: Transfer Case Encoder Motor, C2
Table 9: Transfer Case Front Propshaft Speed Sensor
Table 10: Transfer Case Rear Propshaft Speed Sensor

Four Wheel Drive Indicator Switch


Object Number: 38552  Size: CH

Connector Part Information

    • 12103584
    • 2-Way M Weather-Pack (BRN)

Pin

Wire Color

Circuit No.

Function

A

BRN

241

Fuse Output - Ignition 3

B

BLK/WHT

1695

Four Wheel Drive Front Wheel Lock Telltale Feed

Front Drive Axle Clutch Solenoid


Object Number: 35437  Size: CH

Connector Part Information

    • 12052641
    • 2-Way F Metri-Pack 150 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

241

Fuse Output - Ignition 3

B

GRY/BLK

1570

Front Axle Actuator Output

Transfer Case Shift Control Module, (C1)


Object Number: 73221  Size: CH

Connector Part Information

    • 12052107
    • 32-Way F Micro-Pack 100 Series (ORN)

Pin

Wire Color

Circuit No.

Function

E1

TAN

1569

Transfer Case Lock Solenoid Output

E2

--

--

Not Used

E3

PNK

1561

AWD Indicator Lamp Signal

E4

LT GRN /BLK

1563

Transfer Case Indicator Lamp Signal

E5

BRN/WHT

1555

Encoder Channel P

E6

RED/WHT

1556

Encoder Channel C

E7

YEL/BLK

1558

Encoder Channel B

E8

DK BLU/WHT

1557

Encoder Channel A

E9

PPL

1807

Class 2 Serial Data Signal

E10

BRN

241

Fuse Output - Ignition 3

E11

--

--

Not Used

E12

YEL

400

Front Speed Sensor (FSS) Hi

E13

PPL

401

Front Speed Sensor (FSS) Low

E14

BLK/WHT

1695

4WD Front Wheel Lock Telltale Feed

E15

--

--

Not Used

E16

BLK/WHT

451

Ground

F1

PPL/WHT

1565

4 LO Indicator Lamp Output

F2

TAN/BLK

1566

4 HI Indicator Lamp Output

F3

BRN

1560

Neutral Indicator Lamp Output

F4

GRYBLK

1570

Front Drive Axle Clutch Solenoid Output

F5

LT BLU

2221

Rear Speed Sensor (RSS) Hi

F6

DK GRN

2222

Rear Speed Sensor (RSS) Low

F7

GRY/BLK

1694

4WD Low Indicator Signal

F8-F11

--

--

Not Used

F12

BLK/WHT

1554

Transfer Case Encoder Signal Return

F13

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt

F14

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt

F15

--

--

Not Used

F16

LT BLU

1693

4WD Switch Selection Signal

Transfer Case Shift Control Module, C2


Object Number: 62450  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed - Clockwise

B

RED

1553

Transfer Case Motor Feed - Counterclockwise

C

BLK

1850

Ground

D

ORN

1640

Fuse Output - Battery

Transfer Case Shift Control Switch, C1


Object Number: 130635  Size: CH

Connector Part Information

    • 12045813
    • 4-Way F Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt

B

LT GRN/BLK

1563

2 HI Indicator Lamp Signal

C

PPL/WHT

1565

4 LO Indicator Lamp Output

D

TAN/BLK

1566

4 HI Indicator Lamp Output

Transfer Case Shift Control Switch, C2


Object Number: 39746  Size: CH

Connector Part Information

    • 12064862
    • 8-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1850

Ground

B

PNK

1561

AWD SignalIndicator Lamp

C

BRN

1560

Neutral Indicator Lamp Output

D

--

--

Not Used

E

PPL/WHT

1382

LED Dimming Signal

F

GRA

1220

Fuse Output - Instrument Panel Lamps

G

BRN

241

Fuse Output - Ignition 3

H

LT BLU

1693

4WD Switch Signal

Transfer Case Encoder Motor, C1


Object Number: 365977  Size: CH

Connector Part Information

    • 12191399
    • 4-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed - Clockwise

B

RED

1553

Transfer Case Motor Feed - Counterclockwise

C

ORN

1640

Fuse Output - Battery

D

TAN

1569

Transfer Case Lock Solenoid Output

Transfer Case Encoder Motor, C2


Object Number: 62449  Size: CH

Connector Part Information

    • 12052848
    • 6-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1554

Transfer Case Encoder Signal Return

B

DK BLU/WHT

1557

Encoder Channel A

C

RED/WHT

1556

Encoder Channel C

D

YEL/BLK

1558

Encoder channel B

E

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt

F

BRN/WHT

1555

Encoder Channel P

Transfer Case Front Propshaft Speed Sensor


Object Number: 237066  Size: CH

Connector Part Information

    • 12162194
    • 2-Way F Metri-Pack 150.2 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

400

Front Speed Sensor (FSS) Hi

B

PPL

401

Front Speed Sensor (FSS) Lo

Transfer Case Rear Propshaft Speed Sensor


Object Number: 237066  Size: CH

Connector Part Information

    • 12162194
    • 2-Way F Metri-Pack 150.2 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

2221

Rear Speed Sensor (RSS) Hi

B

DK GRN

2222

Rear Speed Sensor (RSS) Lo