GM Service Manual Online
For 1990-2009 cars only

OnStar® Keypad


Object Number: 62439  Size: CH

Connector Part Information

    • 12047786
    • 8- Way F Metri-Pack 150 Series BLK

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

2515

Keypad Power

B

DK GRN/WHT

2514

Keypad Signal

C-D

--

--

Not Used

E

ORN/BLK

2518

Keypad Return

F

YEL/BLK

2516

Keypad LED GRN

G

BRN/WHT

2517

Keypad LED RED

H

--

--

Not Used

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

ORN

1044

Serial Data Signal -Class B-10400 BAUD-Primary

A3

DK GRN

835

Diagnostic Signal (E&C Serial Data)

A4 - A5

--

--

Not Used

A6

BLK/WHT

372

Remote Radio Return-Audio

A7

DK GRN/WHT

368

Remote Radio Audio Signal - R +

A8

BRN/WHT

367

Remote Radio Audio Signal - L +

A9

BARE

814

Drain Wire Return

A10

LT BLU

1235

XCVR Audio Return

A11

BRN/WHT

2506

Audio Signal RX

A12

DK GRN/WHT

2507

Audio Signal TX

A13

BARE

1792

Ground

A14

GRY/BLK

2508

XCVR Microphone IN

A15

--

--

Not Used

A16

ORN

2540

Fused Battery Positive Voltage

B1 - B8

--

--

Not Used

B9

GRY

655

Cellular Telephone Microphone Signal

B10

BARE

1705

Drain Wire Return

B11

TAN/BLK

2510

3 Wire Serial - Data Bus

B12

DK BLU/WHT

2511

3 Wire Serial - Data Bus

B13

LT BLU/BLK

2512

3 Wire Serial - Data Bus

B14

GRY

2520

Return

B15

PPL/WHT

2513

Ignition Sense

B16

--

--

Not Used

Vehicle Interface Unit (VIU) - C2


Object Number: 73222  Size: CH

Connector Part Information

    • 12110115
    • 32- Way F Micro-Pack 100 Series BLU

Pin

Wire Color

Circuit No.

Function

E1

BLK

1850

Ground

E2-E3

--

--

Not Used

E4

DK GRN/WHT

2514

Keypad Output Signal

E5

YEL/BLK

2516

Keypad Green LED Power

E6

LT GRN/BLK

2515

Keypad Power

E7-E15

--

--

Not Used

E16

ORN

2240

Fused Battery Positive Voltage

F1

BLK

1850

Ground

F2-F3

--

--

Not Used

F4

ORN/BLK

2518

Keypad Ground

F5

--

--

Not Used

F6

PNK

739

Fused Ignition Positive Voltage

F7-F8

--

--

Not Used

F9

BRN/WHT

2517

Key pad Red LED Power

F10

--

--

Not Used

F11

BLK

707

Retained Accessory Power (RAP)

F12-F15

--

--

Not Used

F16

ORN

2240

Fused Battery Positive Voltage

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

2507

Audio Signal TX

2

--

--

Not Used

3

BLK

2520

Transceiver Low Reference

4

ORN

2540

Audio Signal RX

5

PPL/WHT

2513

Ignition On Signal

6

BRN/WHT

2506

Audio Return Signal

7-10

--

--

Not Used

11

LT BLU/

BLK

2512

OnStar Serial Data (+)

12

DK BLU/

WHT

2511

OnStar Serial Data (-)

13

--

--

Not Used

14

BLK

1792

Drain Wire

15

GRY/BLK

2508

Microphone Signal

16-17

--

--

Not Used

18

TAN/BLK

2510

Onstar Serial Data Return

19-23

--

--

Not Used

24

BLK/WHT

1235

Audio Low Reference

25

--

--

Not Used