GM Service Manual Online
For 1990-2009 cars only
Table 1: Cellular Telephone Interface Board
Table 2: Cellular Telephone Module
Table 3: Cellular Telephone Microphone (w/o OnStar UE1)
Table 4: RF Signal Amplifier
Table 5: Vehicle Communication Unit (VCU)
Table 6: Vehicle Interface Unit (VIU) C1
Table 7: Vehicle Interface Unit (VIU) C2

Cellular Telephone Interface Board


Object Number: 62435  Size: CH

Connector Part Information

    • 12047531
    • 10-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

RED

2526

Controlled Power Low Reference

2

BRN

1941

Controlled Power

3

GRY/BLK

1798

Low Reference

4

PPL/WHT

1156

Handset Keypad Data Signal

5

PPL

679

Display Signal

6

PNK

1155

Audio Handset Low Reference

7

LT BLU

1153

Audio Handset Mouthpiece Signal

8

LT BLU/BLK

1235

Audio Handset Earpiece Signal

9-10

--

--

Not Used

Cellular Telephone Module


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

1051

Ground

E2

PPL

1807

Class 2 Serial Data

E3

--

--

Not Used

E4

PPL

679

Display Signal

E5

GRY/BLK

1798

Low Reference

E6

PPL/WHT

1156

Handset Keypad Data Signal (w/o UE1)

E6

PPL

1156

Handset Keypad Data Signal (w/UE1)

E7

BRN/WHT

367

Voice Signal (w/UE1 only)

E8

BRN

1941

Controlled Power

E9

GRY

344

Cellular Telephone RF Boost Control Signal

E10

--

--

Not Used

E11

DK BLU

658

Cellular Telephone Voice Signal

E12

LT BLU/BLK

1235

Audio Handset Earpiece Signal (w/o UE1)

E12

LT BLU

1235

Audio Handset Earpiece Signal (w/UE1)

E13

LT BLU

1153

Audio Handset Mouthpiece Signal

E14

BARE

814

Cellular Telephone Microphone Drain Wire

E15

GRY

655

Cellular Telephone Microphone Signal

E16

ORN

2240

Battery Positive Voltage

F1

--

--

Not Used

F2

PPL

1807

Class 2 Serial Data (w/UE1)

F3

ORN/BLK

2360

Modem Audio Low Reference (w/UE1)

F4

TAN/BLK

2388

Modem Audio Receive Signal (w/UE1)

F5

BRN/WHT

2387

Modem Audio Transmit Signal (w/UE1)

F6 - F7

--

--

Not Used

F8

RED

2526

Cotrolled Power Low Reference

F9

BARE

814

Cellular Telephone Microphone Drain Wire (w/UE1)

F10

BARE

814

Voice Signal Drain Wire

F11

LT BLU/BLK

659

Cellular Telephone Voice Low Reference

F12

BARE

814

Audio Signal Drain Wire

F13

PNK

1155

Audio Handset Low Reference

F14- F15

--

--

Not Used

F16

GRY

655

Cellular Telephone Microphone Signal (w/UE1)

Cellular Telephone Microphone (w/o OnStar UE1)


Object Number: 35441  Size: CH

Connector Part Information

    • 12059449
    • 2-Way M Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

BARE

814

Cellular Telephone Microphone Drain Wire

B

GRY

655

Cellular Telephone Microphone Signal

RF Signal Amplifier


Object Number: 603064  Size: CH

Connector Part Information

    • 15324585
    • 4-Way M (BLK)

Pin

Wire Color

Circuit No.

Function

1

BLK

1051

Ground

2-3

--

--

Not Used

4

GRY

344

Cellular Telephone RF Boost Control Signal

Vehicle Communication Unit (VCU)


Object Number: 585586  Size: CH

Connector Part Information

    • AMP 205207-1
    • 25-Way F DB-25 (GRY)

Pin

Wire Color

Circuit No.

Function

1

DK GRN/WHT

2507

Transceiver Audio Transmit Signal

2

--

--

Not Used

3

GRY/BLK

2520

Transceiver Digital Low Reference

4

ORN

2240

Transceiver Battery Positive Voltage

5

PPL/WHT

2513

Transceiver Ignition Sense Signal

6

BRN/WHT

2506

Transceiver Audio Return Signal

7 - 10

--

--

Not Used

11

LT BLU/BLK

2512

Transceiver TRU Signal

12

WHT

2511

Transceiver CMP Signal

13

--

--

Not Used

14

BARE

1792

Transceiver Microphone Drain Wire

15

GRY/BLK

2508

Transceiver Microphone Signal

16 - 17

--

--

Not Used

18

TAN/BLK

2510

Transceiver RTN Signal

19 - 23

--

--

Not Used

24

LT BLU

1235

Transceiver Audio Low Reference

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

Class 2 Serial Data

A3 - A5

--

--

Not Used

A6

BLK/WHT

372

Voice Low Reference

A7

--

--

Not Used

A8

BRN/WHT

367

Voice Signal

A9

BARE

814

Voice Signal Drain Wire

A10

LT BLU

1235

Transceiver Audio Low Reference

A11

BRN/WHT

2506

Transceiver Audio Return Signal

A12

DK GRN/WHT

2507

Transceiver Audio Transmit Signal

A13

BARE

1792

Transceiver Microphone Drain Wire

A14

GRY/BLK

2508

Transceiver Microphone Signal

A15

BARE

814

Transceiver Audio Drain Wire

A16

ORN

2240

Transceiver Battery Positive Voltage

B1 - B8

--

--

Not Used

B9

GRY

655

Cellular Telephone Microphone Signal (w/o UV8)

B9

GRY/BLK

655

Cellular Telephone Microphone Signal (w/UV8)

B10

BARE

814

Cellular Telephone Microphone Drain Wire

B11

TAN/BLK

2510

Transceiver RTN Signal

B12

WHT

2511

Transceiver CMP Signal

B13

LT BLU/BLK

2512

Transceiver TRU Signal

B14

GRY/BLK

2520

Transceiver Digital Low Reference

B15

PPL/WHT

2513

Transceiver Ignition Sense Signal

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

1051

Ground

E2 - E3

--

--

Not Used

E4

DK GRN/WHT

2514

OnStar Keypad Control Signal

E5

YEL/BLK

2516

OnStar Keypad Green LED Signal

E6

LT GRN/BLK

2515

OnStar Keypad Power Signal

E7 - E15

--

--

Not Used

E16

ORN

2240

Battery Positive Voltage

F1

BLK

1051

Ground

F2 - F8

--

--

Not Used

F9

BRN/WHT

2517

OnStar Keypad Red LED Signal

F10 - F15

--

--

Not Used

F16

ORN

2240

Battery Positive Voltage