GM Service Manual Online
For 1990-2009 cars only
Table 1: Audio Amplifier C1
Table 2: Audio Amplifier C2
Table 3: Audio Amplifier C3
Table 4: CD Changer C1
Table 5: CD Changer C2
Table 6: Digital Radio Receiver
Table 7: Noise Compensation Microphone
Table 8: Radio C1
Table 9: Radio C2
Table 10: Radio C3 (Japan)
Table 11: Radio Antenna Module - Left
Table 12: Radio Antenna Module - Right C1
Table 13: Radio Antenna Module - Right C2
Table 14: Speaker - Center
Table 15: Speaker - Driver Seat Left
Table 16: Speaker - Driver Seat Right
Table 17: Speaker - Passenger Seat Left
Table 18: Speaker - Passenger Seat Right
Table 19: Speaker - LF Door Subwoofer
Table 20: Speaker - LF Midrange
Table 21: Speaker - RF Door Subwoofer
Table 22: Speaker - RF Midrange
Table 23: Steering Wheel Control Switch Assembly - C1
Table 24: Steering Wheel Control Switch Assembly - C2

Audio Amplifier C1


Object Number: 73158  Size: CH

Connector Part Information

    • OEM: 12110626
    • Service: 12110626
    • 8-Way F Metri-Pack 280 Series, Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A

BK/WH

651

Signal Ground

B

--

--

Not Used

C

D-GN

117

Right Front Speaker Signal (-) (1)

D

TN

201

Left Front Speaker (+) (1)

E

GY

118

Left Front Speaker Signal (-) (1)

F

L-GN

200

Right Front Speaker (+) (1)

G

--

--

Not Used

H

RD/BK

142

Battery Positive Voltage

Audio Amplifier C2


Object Number: 73156  Size: CH

Connector Part Information

    • OEM: 12110088
    • Service: 12110088
    • 24-Way F Micro-Pack 100 Series (GY)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

BN

199

Left Rear Speaker (+)

A3

YE

116

Left Rear Speaker Signal (-)

A4

TN

1856

Left Front Tweeter Speaker (+)

A5

YE

1956

Left Front Tweeter Speaker (-)

A6

L-BU

1960

Front Center Speaker (-)

A7

YE

1860

Front Center Speaker (+)

A8

PU

1952

Right Front Tweeter Speaker (-)

A9

L-GN

1852

Right Front Tweeter Speaker (+)

A10

L-BU

115

Right Rear Speaker Signal (-)

A11

D-BU

46

Right Rear Speaker (+)

A12

L-BU

1405

Remote Tape Player Audio Communication Signal

B1-B7

--

--

Not Used

B8

L-GN

1948

Right Front Low Level Audio (-)

B9

D-GN

1947

Left Front Low Level Audio (-)

B10

TN

511

Left Front Low Level Audio Signal

B11

D-GN

512

Right Front Low Level Audio Signal

B12

OG/BK

1406

Remote Tape Player Left Audio Signal

Audio Amplifier C3


Object Number: 280764  Size: CH

Connector Part Information

    • OEM: 12064993
    • Service: 12102485
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

D-BU

2272

Class 2 Serial Data

6

--

--

Not Used

7

BARE

1489

Noise Reduction Microphone Drain Wire

8

D-GN

1488

Noise Reduction Microphone (+)

9

D-GN

5743

Radio Voice Prompt Signal

10

TN

5778

Radio Voice Prompt Low Reference

CD Changer C1


Object Number: 1283837  Size: CH

Connector Part Information

    • OEM: 15422427
    • Service: 89046662
    • 16-Way F (WH)

Pin

Wire Color

Circuit No.

Function

1

BK

651

Signal Ground

2

PK

2060

Auxiliary Detection Signal

3-4

--

--

Not Used

5

D-GN/WH

368

Remote Radio Right Audio Signal (1)

6-9

--

--

Not Used

10

PU

1375

Remote Radio Control Head Accessory Supply Voltage

11

D-BU

1796

Steering Column Radio Control Signal

12

--

--

Not Used

13

TN/WH

372

Remote Radio Audio (-)

14

BN/WH

367

Remote Radio Left Audio Signal

15

TN

5072

Class 2 Serial Data

16

RD/WH

740

Battery Positive Voltage

CD Changer C2


Object Number: 1283836  Size: CH

Connector Part Information

    • OEM: 15422428
    • Service: 89046661
    • 20-Way F (WH)

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

TN

511

Left Front Low Level Audio Signal

5

L-GN/BK

512

Right Front Low Level Audio Signal

6

TN

511

Left Front Low Level Audio Signal

7

L-GN/BK

512

Right Front Low Level Audio Signal

8

BARE

2012

Right Front Audio Drain Wire

9-13

--

--

Not Used

14

D-GN

1947

Left Front Low Level Audio (-)

15

L-GN

1948

Right Front Low Level Audio (-)

16

D-GN

1947

Left Front Low Level Audio (-)

17

BARE

2011

Left Front Audio Drain Wire

18

L-GN

1948

Right Front Low Level Audio (-)

19-20

--

--

Not Used

Digital Radio Receiver


Object Number: 850856  Size: CH

Connector Part Information

    • OEM: 15394150
    • Service: 15394150
    • 16-Way F ASM (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BN/WH

367

Left Audio Signal

3

D-GN/WH

368

Right Audio Signal

4-8

--

--

Not Used

9

BK/WH

651

Ground

10

TN/WH

372

Audio Common

11

BARE

814

Drain

12-14

--

--

Not Used

15

L-BU

5781

Class 2 Serial Data

16

RD/WH

740

Battery Positive Voltage

Noise Compensation Microphone


Object Number: 35441  Size: CH

Connector Part Information

    • OEM: 12047663
    • Service: 12085481
    • 2-Way M Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BARE

1489

Drain

B

D-GN

1488

Noise Compensation Microphone Signal

Radio C1


Object Number: 73222  Size: CH

Connector Part Information

    • OEM: 12110115
    • Service: 12110115
    • 32-Way F Micro-Pack 100 Series (BU)

Pin

Wire Color

Circuit No.

Function

E1-E3

--

--

Not Used

E4

YE

5172

Antenna Radio Signal

E5

--

--

Not Used

E6

OG

1044

Radio Class 2 Serial Data

E7-E11

--

--

Not Used

E12

TN

511

Left Front Low Level Audio Signal

E13

D-GN

1947

Left Front Low Level Audio (-)

E14

BARE

2011

Left Front Audio Drain Wire

E15

BARE

2012

Right Front Audio Drain Wire

E16

BK/WH

651

Signal Ground

F1

RD/WH

740

Battery Positive Voltage

F2

D-GN/WH

817

Vehicle Speed Signal

F3

WH

1487

Switched Antenna Enable Signal

F4-F10

--

--

Not Used

F11

BARE

5344

Navigation Voice Screen

F12

TN

5778

Radio Voice Prompt Low Reference

F13

D-GN

5743

Radio Voice Prompt Signal

F14

L-GN

1948

Right Front Low Level Audio (-)

F15

L-GN/BK

512

Right Front Low Level Audio Signal

F16

BARE

2060

Auxiliary Detection Signal

Radio C2


Object Number: 1283833  Size: CH

Connector Part Information

    • OEM: 15380274
    • Service: 88986439
    • 5-Way F (BK)

Pin

Wire Color

Circuit No.

Function

1

PK

5149

Voice Recognition Audio Signal (OnStar)

2

BARE

1705

Drain Wire (Export)

PK/BK

5152

Voice Recognition Audio Low Reference (OnStar)

3-5

--

--

Not Used

Radio C3 (Japan)


Object Number: 861685  Size: CH

Connector Part Information

    • OEM: 15383013
    • Service: 88953363
    • 6-Way F (WH)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

YE

5385

Vehicle Identification Communication System Bus Request Signal (Japan)

3

GY

5383

Vehicle Identification Communication System High Signal (Japan)

4

--

--

Not Used

5

BARE

514

Drain Wire (Japan)

6

BN

5384

Vehicle Identification Communication System Low Signal (Japan)

Radio Antenna Module - Left


Object Number: 1204333  Size: CH

Connector Part Information

    • OEM: 10774586
    • Service: See Catalog
    • 2-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

1

GN

--

Left Antenna Signal - FM 2

2

D-BU

--

Ground

Radio Antenna Module - Right C1


Object Number: 1204333  Size: CH

Connector Part Information

    • OEM: 10774586
    • Service: See Catalog
    • 2-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

1

RD

1487

Antenna Enable Signal

2

BN

5172

FM Composite Signal

Radio Antenna Module - Right C2


Object Number: 1204333  Size: CH

Connector Part Information

    • OEM: 10774586
    • Service: See Catalog
    • 2-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

1

YE

--

Right Antenna Signal - AM

2

RD

--

Right Antenna Signal - FM

Speaker - Center


Object Number: 280768  Size: CH

Connector Part Information

    • OEM: 12052832
    • Service: 12101825
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

1960

Front Center Speaker (-)

B

YE

1860

Front Center Speaker (+)

Speaker - Driver Seat Left


Object Number: 82383  Size: CH

Connector Part Information

    • OEM: 12047662
    • Service: 12085535
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

116

Left Rear Speaker Signal (-)

B

BN

199

Left Rear Speaker (+)

Speaker - Driver Seat Right


Object Number: 82383  Size: CH

Connector Part Information

    • OEM: 12047662
    • Service: 12085535
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

115

Right Rear Speaker Signal (-)

B

D-BU

46

Right Rear Speaker (+)

Speaker - Passenger Seat Left


Object Number: 82383  Size: CH

Connector Part Information

    • OEM: 12047662
    • Service: 12085535
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

116

Left Rear Speaker Signal (-)

B

BN

199

Left Rear Speaker (+)

Speaker - Passenger Seat Right


Object Number: 82383  Size: CH

Connector Part Information

    • OEM: 12047662
    • Service: 12085535
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

115

Right Rear Speaker Signal (-)

B

D-BU

46

Right Rear Speaker (+)

Speaker - LF Door Subwoofer


Object Number: 68737  Size: CH

Connector Part Information

    • OEM: 12129489
    • Service: 12126486
    • 3-Way F Metri-Pack 280 Series, Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

TN

201

Left Front Subwoofer Speaker Output (+)

B

--

--

Not Used

C

GY

118

Left Front Subwoofer Speaker Output (-)

Speaker - LF Midrange


Object Number: 280768  Size: CH

Connector Part Information

    • OEM: 12052832
    • Service: 12101825
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

1956

Left Front Tweeter Speaker (-)

B

TN

1856

Left Front Tweeter Speaker (+)

Speaker - RF Door Subwoofer


Object Number: 68737  Size: CH

Connector Part Information

    • OEM: 12129489
    • Service: 12126486
    • 3-Way F Metri-Pack 280 Series, Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

L-GN

200

Right Front Subwoofer Speaker Output (+)

B

--

--

Not Used

C

D-GN

118

Left Front Subwoofer Speaker Output (-)

Speaker - RF Midrange


Object Number: 280768  Size: CH

Connector Part Information

    • OEM: 12052832
    • Service: 12101825
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

1952

Right Front Tweeter Speaker (-)

B

L-GN

1852

Right Front Tweeter Speaker (+)

Steering Wheel Control Switch Assembly - C1


Object Number: 1333392  Size: CH

Connector Part Information

    • OEM: 50-57-9407 (Molex)
    • Service: See Catalog
    • 7-Way F (BK)

Pin

Wire Color

Circuit No.

Function

1

L-BU

--

Steering Wheel Controls Signal

2

D-BU

1796

Steering Wheel Controls Signal

3

YE

1491

Backlight Lamps Control

4

BK

1450

Ground

5

PK

1039

Ignition 1 Voltage

6

D-BU

900

Steering Wheel Controls Signal

7

--

--

Not Used

Steering Wheel Control Switch Assembly - C2


Object Number: 605511  Size: CH

Connector Part Information

    • OEM: 50-57-9405 (Molex)
    • Service: See Catalog
    • 5-Way F (BK)

Pin

Wire Color

Circuit No.

Function

1

YE

1491

Backlight Lamps Control

2

BK

1450

Ground

3

PU

1375

Remote Radio Control Supply Voltage

4

L-BU

--

Steering Wheel Controls Signal

5

D-BU

1796

Steering Wheel Controls Signal