GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Transfer Case Shift Control Module (C1)
Table 2: Automatic Transfer Case Shift Control Module (C2)
Table 3: Propshaft Speed Sensor Front
Table 4: Propshaft Speed Sensor Rear

Automatic Transfer Case Shift Control Module (C1)


Object Number: 73221  Size: CH

Connector Part Information

    • 12052107
    • 32-Way Female MIC/P 100W (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

DK GRN/WHT

1133

Class 2 Data - Diagnostic to A4WD (Transfer Case)

E10

BRN

441

Fuse Output - Ignition 3 - Type 3

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

Vehicle Speed Sensor Signal

F6

DK GRN

2222

Vehicle Speed Sensor Return

F7-F16

--

--

Not Used

Automatic 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

Propshaft Speed Sensor Front


Object Number: 35437  Size: CH

Connector Part Information

    • 15335351
    • 2-Way Female M/P 150.2 P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

400

Vehicle Speed Sensor Signal

B

PPL

401

Vehicle Speed Sensor Return

Propshaft Speed Sensor Rear


Object Number: 35437  Size: CH

Connector Part Information

    • 15335352
    • 2-Way Female M/P 150.2 P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

2221

Vehicle Speed Sensor Signal

B

DK GRN

2222

Vehicle Speed Sensor Return