GM Service Manual Online
For 1990-2009 cars only
Table 1: Audio Amplifier C1 (U88)
Table 2: Audio Amplifier C2 (U88)
Table 3: Digital Radio Antenna (U2K)
Table 4: Digital Radio Receiver C1 (U2K)
Table 5: Digital Radio Receiver C2 (U2K)
Table 6: Radio C1
Table 7: Radio C2
Table 8: Radio Antenna Module
Table 9: Speaker - Center (U88)
Table 10: Speaker - LF Door
Table 11: Speaker - LF Tweeter
Table 12: Speaker - LR (UW6)
Table 13: Speaker - LR (U88)
Table 14: Speaker - RF Door
Table 15: Speaker - RF Tweeter
Table 16: Speaker - RR (UW6)
Table 17: Speaker - RR (U88)
Table 18: Steering Wheel Controls - Left (UK3)
Table 19: Steering Wheel Controls - Right (UK3)

Audio Amplifier C1 (U88)


Object Number: 1552610  Size: CH

Connector Part Information

    • OEM: 15357040
    • Service: See Catalog
    • 8-Way F Metri-Pack 280 Series (GY)

Pin

Wire Color

Circuit No.

Function

A

L-GN

200

Right Front Speaker Output (+)

B

D-GN

117

Right Front Speaker Output (-)

C

GY

118

Left Front Speaker Output (-)

D

TN

201

Left Front Speaker Output (+)

E

OG

2040

Battery Positive Voltage

F

BK/WH

351

Ground

G

YE

1860

Front Center Speaker Output (+)

H

L-BU

1960

Front Center Speaker Output (-)

Audio Amplifier C2 (U88)


Object Number: 130690  Size: CH

Connector Part Information

    • OEM: 12110206
    • Service: See Catalog
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1-A2

--

--

Not Used

A3

PU

2232

Radio On Signal

A4

BN/WH

599

Left Rear Low Level Audio Signal (+)

A5

BN

1999

Left Rear Low Level Audio Signal (-)

A6

D-GN

1947

Left Front Low Level Audio Signal (-)

A7

TN

511

Left Front Low Level Audio Signal (+)

A8

TN

927

Amplifier Control

A9

D-BU

46

Right Rear Speaker Output (+)

A10

L-BU

115

Right Rear Speaker Output (-)

A11

BN

199

Left Rear Speaker Output (+)

A12

YE

116

Left Rear Speaker Output (-)

B1

L-GN/BK

1794

Rear Subwoofer Speaker Output (-)

B2

D-BU/WH

346

Rear Subwoofer Speaker Output (+)

B3

--

--

Not Used

B4

BK

1946

Right Rear Low Level Audio Signal (-)

B5

D-BU

546

Right Rear Low Level Audio Signal (+)

B6

L-GN/WH

512

Right Front Low Level Audio Signal (+)

B7

L-GN

1948

Right Front Low Level Audio Signal (-)

B8

--

--

Not Used

B9

BK

1856

Left Front Tweeter Speaker Output (+)

B10

YE

1956

Left Front Tweeter Speaker Output (-)

B11

L-GN

1852

Right Front Tweeter Speaker Output (+)

B12

PU

1952

Right Front Tweeter Speaker Output (-)

Digital Radio Antenna (U2K)


Object Number: 1548652  Size: CH

Connector Part Information

    • OEM: 11 ARC-0-0-1K3 (Huber Suhner)
    • Service: See Catalog
    • 1-Way F Fakra SMB (TN)

Pin

Wire Color

Circuit No.

Function

--

TN

COAX

Antenna Signal

Digital Radio Receiver C1 (U2K)


Object Number: 850856  Size: CH

Connector Part Information

    • OEM: 15394150
    • Service: See Catalog
    • 16-Way F Micro 64 Series (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

351

Ground

10

BK/WH

372

Audio Common

11

BARE

814

Drain Wire

12-14

--

--

Not Used

15

D-BU

1128

Class 2 Serial Data

16

OG

640

Battery Positive Voltage

Digital Radio Receiver C2 (U2K)


Object Number: 1548652  Size: CH

Connector Part Information

    • OEM: 11 ARC-0-0-1K3 (Huber Suhner)
    • Service: See Catalog
    • 1-Way F Fakra SMB (TN)

Pin

Wire Color

Circuit No.

Function

--

TN

COAX

Antenna Signal

Radio C1


Object Number: 73156  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

OG

1044

Radio Class 2 Serial Data

A2-A5

--

--

Not Used

A6

PU

1375

Remote Radio Control Supply Voltage (UK3)

A7

D-BU

1796

Steering Wheel Controls Signal (UK3)

A8

TN

201

Left Front Speaker Output (+) (UW6)

TN

511

Left Front Low Level Audio Signal (+) (U88)

A9

GY

118

Left Front Speaker Output (-) (UW6)

D-GN

1947

Left Front Low Level Audio Signal (-) (U88)

A10

L-BU

115

Right Rear Speaker Output (-) (UW6)

BK

1946

Right Rear Low Level Audio Signal (-) (U88)

A11

D-BU

46

Right Rear Speaker Output (+) (UW6)

D-BU

546

Right Rear Low Level Audio Signal (+) (U88)

A12

BK/WH

351

Ground

B1

OG

2040

Battery Positive Voltage

B2

--

--

Not Used

B3

PU

2232

Radio On Signal

B4

GY

8

Instrument Panel Lamp Supply Voltage

B5

BK

1450

Ground

B6-B7

--

--

Not Used

B8

BN

199

Left Rear Speaker Output (+) (UW6)

BN/WH

599

Left Rear Low Level Audio Signal (+) (U88)

B9

YE

116

Left Rear Speaker Output (-) (UW6)

BN

1999

Left Rear Low Level Audio Signal (-) (U88)

B10

D-GN

117

Right Front Speaker Output (-) (UW6)

L-GN

1948

Right Front Low Level Audio Signal (-) (U88)

B11

L-GN

200

Right Front Speaker Output (+) (UW6)

L-GN/WH

512

Right Front Low Level Audio Signal (+) (U88)

B12

--

--

Not Used

Radio C2


Object Number: 73151  Size: CH

Connector Part Information

    • OEM: 12064799
    • Service: 15305996
    • 12-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

A-E

--

--

Not Used

F

TN

927

Amplifier Control (U88)

G

--

--

Not Used

H

D-GN/WH

368

Right Audio Signal (+) (U2K)

J

BN/WH

367

Left Audio Signal (+) (U2K)

K

BK/WH

372

Audio Common (U2K)

L

L-BU

1405

Audio Common Signal (UE1)

M

OG/BK

1406

Left Audio Signal (+) (UE1)

Radio Antenna Module


Object Number: 1548336  Size: CH

Connector Part Information

    • OEM: 15368970 (Delphi)
        172074-2 (AMP)
    • Service: See Catalog
    • 1-Way F Positive Lock 187 Series (BK)

Pin

Wire Color

Circuit No.

Function

1

PU

2232

Radio On Signal

Speaker - Center (U88)


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

1960

Front Center Speaker Output (-)

B

YE

1860

Front Center Speaker Output (+)

Speaker - LF Door


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

GY

118

Left Front Speaker Output (-)

B

TN

201

Left Front Speaker Output (+)

Speaker - LF Tweeter


Object Number: 766913  Size: CH

Connector Part Information

    • OEM: Assembly 12065651
        Connector 12052833
        Clip 08905563
    • Service: 12117275
    • 2-Way M Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

GY

118

Left Front Speaker Output (-) (UW6)

YE

1956

Left Front Tweeter Speaker Output (-) (U88)

B

TN

201

Left Front Speaker Output (+) (UW6)

BK

1856

Left Front Tweeter Speaker Output (+) (U88)

Speaker - LR (UW6)


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

116

Left Rear Speaker Output (-)

B

BN

199

Left Rear Speaker Output (+)

Speaker - LR (U88)


Object Number: 130637  Size: CH

Connector Part Information

    • OEM: 12064760
    • Service: 12085208
    • 4-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

YE

116

Left Rear Speaker Output (-)

B

BN

199

Left Rear Speaker Output (+)

C

L-GN/BK

1794

Rear Subwoofer Speaker Output (-)

D

D-BU/WH

346

Rear Subwoofer Speaker Output (+)

Speaker - RF Door


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

D-GN

117

Right Front Speaker Output (-)

B

L-GN

200

Right Front Speaker Output (+)

Speaker - RF Tweeter


Object Number: 766913  Size: CH

Connector Part Information

    • OEM: 12052833
    • Service: 12117275
    • 2-Way M Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

D-GN

117

Right Front Speaker Output (-) (UW6)

PU

1952

Right Front Tweeter Speaker Output (-) (U88)

B

L-GN

200

Right Front Speaker Output (+) (UW6)

L-GN

1852

Right Front Tweeter Speaker Output (+) (U88)

Speaker - RR (UW6)


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

115

Right Rear Speaker Output (-)

B

D-BU

46

Right Rear Speaker Output (+)

Speaker - RR (U88)


Object Number: 130637  Size: CH

Connector Part Information

    • OEM: 12064760
    • Service: 12085208
    • 4-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-BU

115

Right Rear Speaker Output (-)

B

D-BU

46

Right Rear Speaker Output (+)

C

L-GN/BK

1794

Rear Subwoofer Speaker Output (-)

D

D-BU/WH

346

Rear Subwoofer Speaker Output (+)

Steering Wheel Controls - Left (UK3)


Object Number: 605502  Size: CH

Connector Part Information

    • OEM: 50-57-9404 (Molex)
    • Service: See Catalog
    • 4-Way F 2.54 Single Row Positive Latch (BK)

Pin

Wire Color

Circuit No.

Function

1

D-BU

1796

Steering Controls Signal

2

BK

1550

Ground

3

GY/BK

1458

Instrument Panel Lamp Supply Voltage

4

D-BU

--

Remote Radio Control Supply Voltage

Steering Wheel Controls - Right (UK3)


Object Number: 605511  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

1

D-BU

1796

Steering Wheel Controls Signal

2

D-BU

--

Remote Radio Control Supply Voltage

3

BK

1550

Ground

4

GY/BK

1458

Instrument Panel Lamp Supply Voltage

5

PU

1375

Remote Radio Control Supply Voltage