GM Service Manual Online
For 1990-2009 cars only

OnStar Keypad C1


Object Number: 39661  Size: CH

Connector Part Information

    • 12047786
    • 4- Way Metri-Pack 150 Series BLK

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used

C

GRN

974

Keypad Signal

D

LT/GRN BLK

975

Keypad Power

OnStar Keypad C2


Object Number: 287973  Size: CH

Connector Part Information

    • 12047782
    • 3- Way Metri-Pack 150 Series BLK

Pin

Wire Color

Circuit No.

Function

A

YEL/BLK

977

Keypad LED GRN

B

ORN/BLK

978

Keypad Ground

C

BRN/WHT

979

Keypad LED RED

Vehicle Interface Unit (VIU) C1


Object Number: 258912  Size: CH

Connector Part Information

    • 12110113
    • 32- Way F Micro-Pack 150 Series RED

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

PPL

1807

Serial Data Signal -Class B-10400 BAUD-Primary

A3

BARE

835

DIAGNOSTIC SIGNAL-ENTERTAINMENT AND COMFORT

A4 - A5

--

--

Not Used

A6

BLK/WHT

372

Remote Radio Return-Audio

A7

DK GRN/WHT

368

Remote Radio Signal - Right Audio

A8

BRN/WHT

367

Remote Radio Signal - Left Audio

A9

BARE

814

Drain Wire Return

A10

BLK/WHT

981

Ground

A11

BRN/WHT

964

Audio signal RX

A12

DK GRN/WHT

965

Audio signal TX

A13

BARE

966

Ground

A14

GRY/BLK

967

XCVR Microphone IN

A15

--

--

Not Used

A16

ORN

2240

Fuse Output -Battery -TYPE III Fuse

B1 - B8

--

--

Not Used

B9

GRY

655

Cellular Telephone Microphone Signal

B10

BARE

1705

Drain Wire Return

B11

TAN/BLK

968

3 Wire Serial - Data Bus

B12

DK BLU/WHT

969

3 Wire Serial - Data Bus

B13

LT BLU/BLK

970

3 Wire Serial - Data Bus

B14

GRY/BLK

1798

Return

B15

PPL/WHT

971

Ignition Sense

B16

--

--

Not Used

Vehicle Interface Unit (VIU) C2


Object Number: 73222  Size: CH

Connector Part Information

    • 12110113
    • 32- Way F Micro-Pack 100 Series BLU

Pin

Wire Color

Circuit No.

Function

E1

BLK

150

Ground

E2-E3

--

--

Not Used

E4

DK GRN/WHT

974

Keypad Output Signal

E5

YEL/BLK

977

Keypad Green LED Power

E6

LT GRN/BLK

975

Keypad Power

E7-E9

--

--

Not Used

E10

BLK/WHT

624

Vehicle Anti-System Signal Headlamp Alarm

E11

BLK

28

Horn Relay Output-Coil

E12

--

--

Not Used

E13

WHT

194

Power Doorlock Relay Feed-Unlock Coil

E14

BLK/WHT

624

Vehicle Anti-System Signal Headlamp Alarm

E15

--

--

Not Used

E16

ORN

1140

Fused Output Battery - Type III Fuse

F1

BLK

150

Ground

F2-F3

--

--

Not Used

F4

ORN/BLK

978

Keypad Ground

F5

--

--

Not Used

F6

PNK

39

Fused Output Ignition 1 Fuse type III

F7-F8

--

--

Not Used

F9

BRN/WHT

979

Key pad Red LED Power

F10

TAN

800

Serial Data Signal

F11

YEL

43

Fused Output Accessory Type III Fuse

F12-F13

--

--

Not Used

F14

LT BLU

195

Power Door Lock Relay Coil Feed Lock

F15

--

--

Not Used

F16

ORN

1140

Fused Output Battery - Type III Fuse

Vehicle Communication Unit (VCU)


Object Number: 585586  Size: CH

Connector Part Information

    • 205207-1
    • 25- Way F BLK

Pin

Wire Color

Circuit No.

Function

1

DK GRN/WHT

965

Audio signal TX

3

GRY/BLK

1798

Return

4

ORN

2240

Fuse Output -Battery -TYPE III Fuse

5

PPL/WHT

971

Ignition Sense

6

BRN/WHT

964

Audio signal RX

11

LT BLU/WHT

970

3 Wire Serial - Data Bus

12

DK BLU/WHT

969

3 Wire Serial - Data Bus

14

BARE

966

Ground

15

GRY/BLK

967

XCVR Microphone IN

18

TAN/BLK

968

3 Wire Serial - Data Bus

24

BLK/WHT

981

Ground