GM Service Manual Online
For 1990-2009 cars only
Table 1: Transfer Case Encoder Motor
Table 2: Transfer Case Shift Control Module C1
Table 3: Transfer Case Shift Control Module C2
Table 4: Transfer Case Shift Control Module C3
Table 5: Transfer Case Shift Control Switch

Transfer Case Encoder Motor


Object Number: 646412  Size: CH

Connector Part Information

    • 15326642
    • 5-Way F GT 280 Series, Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

L-GN/BK

431

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

Transfer Case Shift Control Module C1


Object Number: 744295  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-A3

--

--

Not Used

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-B2

--

--

Not Used

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-A7

--

--

Not Used

A8

L-GN/BK

431

5-Volt Reference

B1-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

RD

242

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 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU/WH

1565

4 LO Indicator - Control

B

BN

241

Ignition 3 Voltage

C

BN

230

Instrument Panel Lamps Dimming Control

D

BK

2250

Ground

E

TN/BK

1566

4 HI Indicator - Control

F

L-GN/BK

1563

2 HI Indicator - Control

G

BN

1560

Neutral Indicator Control

H

BN

241

Ignition 3 Voltage

J

GY

596

5-Volt Reference

K-L

--

--

Not Used

M

L-BU

1693

Switch Signal