GM Service Manual Online
For 1990-2009 cars only
Table 1: Transfer Case Shift Control
Table 2: Transfer Case Shift Control Module (C1)
Table 3: Transfer Case Shift Control Module (C2)

Transfer Case Shift Control


Object Number: 258251  Size: CH

Connector Part Information

    • 12052600
    • 8-Way Female M/P 150 (GRY)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

YEL

400

Vehicle Speed Sensor Signal

C

PPL

401

Vehicle Speed Sensor Return

D - E

--

--

Not Used

F

LT BLU

2221

Rear Transfer Case Speed Sensor Signal

G

DK GRN

2222

Rear Transfer Case Speed Sensor Return

H

--

--

Not Used

Transfer Case Shift Control Module (C1)


Object Number: 73221  Size: CH

Connector Part Information

    • 12052107
    • 32-Way Female MIC/P 100 (ORN)

Pin

Wire Color

Circuit No.

Function

E1

--

--

Not Used

E2

LT BLU/BLK

1567

Service 4WD/AWD Indicator Lamp Output

E3-E8

--

--

Not Used

E9

PPL

1807

Serial Data Signal Class B 10400 Baud Primary

E10

BRN

441

Fuse Output Ignition Type 3 Fuse

E11

--

--

Not Used

E12

YEL

400

Vehicle Speed Sensor Signal

E13

PPL

401

Vehicle Speed Sensor Return

E14

--

--

Not Used

E15

BLK

750

Ground

E16

BLK

750

Ground

F1-F4

--

--

Not Used

F5

LT BLU

2221

Rear Transfer Case Speed Sensor Signal

F6

DK GRN

2222

Rear Transfer Case Speed Sensor Return

F7-F16

--

--

Not Used

Transfer Case Shift Control Module (C2)


Object Number: 62450  Size: CH

Connector Part Information

    • 12052856
    • 4-Way Female M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed Clockwise

B

RED

1553

Transfer Case Motor Feed Counter Clockwise

C

BLK

750

Ground

D

ORN

1540

Fuse Output Battery Type 3 Fuse