GM Service Manual Online
For 1990-2009 cars only
Table 1: Accessory Switch C1 (C99)
Table 2: Accessory Switch C2
Table 3: Front Axle Actuator
Table 4: Transfer Case Neutral Switch
Table 5: Transfer Case 2/4 Wheel Indicator Switch
Table 6: Transfer Case Encoder Motor
Table 7: Transfer Case Shift Control Module C1
Table 8: Transfer Case Shift Control Module C2

Accessory Switch C1 (C99)


Object Number: 130631  Size: CH

Connector Part Information

    • 12064758
    • 3-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

TN/BK

371

I/P Module Disable Switch - Signal

B

TN/BK

723

I/P Module Disable Switch - Signal

C

YE

1139

Ignition 1 Voltage

Accessory Switch C2


Object Number: 802513  Size: CH

Connector Part Information

    • 15332169
    • 14-Way F GT 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PK

339

Ignition 1 Voltage

B

L-GN/BK

1563

2 'HI' Indicator - Control (4WD)

C

BN

9

Park Lamp Supply Voltage

D

TN/BK

723

I/P Module Disable Switch - Signal (C99)

E

PK

353

I/P Module Suppression Indicator Control (C99)

F

BN

1560

Neutral Indicator Control (4WD)

G

GY

8

Instrument Panel Lamp Dimmer Switch Signal

H

BK

2050

Ground

J

TN/BK

1566

4 'HI' Indicator - Control

K-L

--

--

Not Used

M

GY/BK

1694

5-Volt Reference

N

L-BU/BK

1693

Switch Signal Low

P

PU/WH

1565

4 'LO' Indicator - Control

Front Axle Actuator


Object Number: 1333935  Size: CH

Connector Part Information

    • 12077591
    • 5-Way F Metri-Pack 150 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

BK/WH

1695

Axle Switch Signal

B

L-BU

1296

Axle Actuator - Control

C

PK

1539

Ignition 1 Voltage

D

--

--

Not Used

E

BK

550

Ground

Transfer Case Neutral Switch


Object Number: 1334528  Size: CH

Connector Part Information

    • 10763359
    • 2-Way F SWP 070 Sealed (BN)

Pin

Wire Color

Circuit No.

Function

1

GY

2281

Neutral Switch Signal

2

BK

550

Ground

Transfer Case 2/4 Wheel Indicator Switch


Object Number: 1334538  Size: CH

Connector Part Information

    • 15327093
    • 2-Way F 070 SWP Sealed (GY)

Pin

Wire Color

Circuit No.

Function

1

TN

1569

2WD/4WD Signal

2

BK

550

Ground

Transfer Case Encoder Motor


Object Number: 646400  Size: CH

Connector Part Information

    • 15326835
    • 8-Way F GT 150 Series Sealed 4.0 (BK)

Pin

Wire Color

Circuit No.

Function

A

D-BU/WH

1557

Channel A Encoder - Signal

B

RD

1553

Motor Control B

C

BK

1552

Motor Control A

D

--

--

Not Used

E

BK

550

Ground

F

YE/BK

1558

Channel B Encoder - Signal

G

RD/WH

1556

Channel C Encoder - Signal

H

BN/WH

1555

Channel P Encoder - Signal

Transfer Case Shift Control Module C1


Object Number: 1334450  Size: CH

Connector Part Information

    • 15383128
    • 16-Way F (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

2050

Ground

2

RD

1553

Motor Control B

3

BK

1552

Motor Control A

4

L-BU

1296

Axle Actuator - Control

5-6

--

--

Not Used

7

D-GN/WH

1559

4-LO Switch - Signal

8

OG

1540

Battery Positive Voltage

9

BK

2050

Ground

10

L-GN/BK

1563

2-HI Indicator - Control

11

TN/BK

1566

4-HI Indicator - Control

12

PU/WH

1565

4-LO Indicator - Control

13

BN

1560

Neutral Indicator Control

14

L-BU

1693

Switch Signal Low

15-16

--

--

Not Used

Transfer Case Shift Control Module C2


Object Number: 1334543  Size: CH

Connector Part Information

    • 15383127
    • 20-Way F (BK)

Pin

Wire Color

Circuit No.

Function

1-5

--

--

Not Used

6

D-BU/WH

1557

Channel A Encoder - Signal

7-9

--

--

Not Used

10

PK

339

Ignition 1 Voltage

11

GY

2281

Neutral Switch Signal

12

BK/WH

1695

Axle Switch Signal

13

TN

1569

2WD/4WD Signal

14

RD/WH

1556

Channel C Encoder - Signal

15

YE/BK

1558

Channel B Encoder - Signal

16

PU

1807

Class 2 Serial Data

17

BN/WH

1555

Channel P Encoder - Signal

18

--

--

Not Used

19

PU

1807

Class 2 Serial Data

20

GY/BK

1694

5-Volt Reference