GM Service Manual Online
For 1990-2009 cars only
Connector 1: Amplifier C1 (w/U65)
Connector 2: Amplifier C2 (w/U65)
Connector 3: Digital Radio Receiver
Connector 4: Remote CD Changer C1 (w/UC6)
Connector 5: Remote CD Changer C2 (w/UC6)
Connector 6: Noise Filter
Connector 7: Radio C1 (w/UW4)
Connector 8: Radio C1 (w/U65 - Amplifier)
Connector 9: Radio C1 (w/UW5 - Navigation)
Connector 10: Radio C2 (w/U65 - Amplifier)
Connector 11: Radio C2 (w/UW5 - Navigation)
Connector 12: Left Front Door Speaker (w/UW4, UW5)
Connector 13: Left Front Door Speaker (w/U65)
Connector 14: Left Front Door Tweeter (w/U65)
Connector 15: Right Front Door Speaker (All)
Connector 16: Right Front Door Tweeter (w/U65)
Connector 17: Rear Door Speaker (All)
Connector 18: Subwoofer (U65)
Connector 19: Vehicle Communication Interface Module - C1
Connector 20: Vehicle Communication Interface Module - C2
Connector 21: Vehicle Interface Unit

Amplifier C1 (w/U65)


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: N/A
  • Description: L-GY

Amplifier C1 (w/U65)

Pin

Wire

Function

A1

BK/WH

Sensitivity Control

A2

--

Not Used

A3

BK

Ignition Positive Voltage

A4

BK

Left Rear Audio Input (+)

A5

YE

Left Rear Audio Input (-)

A6

PU

Left Front Audio Input (-)

A7

PK

Left Front Audio Input (+)

A8

WH

Mute Control

A9- A12

--

Not Used

B1

WH

Right Rear Door Speaker Output (-)

B2

RD

Right Rear Door Speaker Output (+)

B3

--

Not Used

B4

WH

Right Rear Audio Input (-)

B5

RD

Right Rear Audio Input (+)

B6

L-GN

Right Front Audio Input (+)

B7

BU

Right Front Audio Input (-)

B8

--

Not Used

B9

RD/WH

Left Front Door Tweeter Output (+)

B10

BU/WH

Left Front Door Tweeter Output (-)

B11

GN/WH

Right Front Door Tweeter Output (+)

B12

BN

Right front Door Tweeter Output (-)

Amplifier C2 (w/U65)


Object Number: 820253  Size: CH

Connector Part Information

  • OEM: 90980-57040
  • Service: N/A
  • Description: GY

Amplifier C2 (w/U65)

Pin

Wire

Function

A

L-GN

Right Front Door Speaker Output (+)

B

BU

Right front Door Speaker Output (-)

C

PU

Left Front Door Speaker Output (-)

D

PK

Left Front Door Speaker Output (+)

E

BU/RD

Battery Positive Voltage

F

WH/BK

Ground

G

BK

Left Rear Door Speaker Output (+)

H

YE

Left Rear Door Speaker Output (-)

Digital Radio Receiver


Object Number: 823325  Size: CH

Connector Part Information

  • OEM: 15394150
  • Service: N/A
  • Description: BK

Digital Radio Receiver

Pin

Wire

Function

1

--

Not Used

2

BN/WH

Remote Radio Left Audio Signal

3

D-GN/WH

Remote Radio Right Audio Signal

4-8

--

Not Used

9

BK/WH

Ground

10

BK/WH

Audio Common

11

BARE

Drain Wire

12-14

--

Not Used

15

PU

Class 2 Serial Data

16

OG

Battery Positive Voltage

Remote CD Changer C1 (w/UC6)


Object Number: 535620  Size: CH

Connector Part Information

  • OEM: 90980-66189
  • Service: N/A
  • Description: WH

Remote CD Changer C1 (w/UC6)

Pin

Wire

Function

1

WH

Left Audio Output

2

BK

Right Audio Output

3

RD

Signal Ground

4

Braided

Drain Wire

Remote CD Changer C2 (w/UC6)


Object Number: 280764  Size: CH

Connector Part Information

  • OEM: 90980-64993
  • Service: N/A
  • Description: BK

Remote CD Changer C2 (w/UC6)

Pin

Wire

Function

5

BU/WH

CD Changer Supply Voltage

6

--

Not Used

7

WH/BK

Ground

8-9

--

Not Used

10

BU

Control Signal

Noise Filter


Object Number: 820022  Size: CH

Connector Part Information

  • OEM: 90980-10825
  • Service: N/A
  • Description: GY

Noise Filter

Pin

Wire

Function

1

BK/WH

Ignition Positive Voltage

2

--

Not Used

Radio C1 (w/UW4)


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: N/A
  • Description: L-GY

Radio C1 (w/UW4)

Pin

Wire

Function

A1-A7

--

Not Used

A8

PK

Left Front Speaker Output (+)

A9

PU

Left Front Speaker Output (-)

A10

WH

Right Rear Speaker Output (-)

A11

RD

Right Rear Speaker Output (+)

A12

BN

Ground G201

B1

BU/YE

Battery Positive Voltage

B2

GY

Ignition Positive Voltage

B3

BK

Antenna Amplifier Supply Voltage

B4

GN

LCD Backlighting Control

B5

WH/GN

LCD Backlighting Dim ground

B6-B7

--

Not Used

B8

BK

Left Rear Speaker Output (+)

B9

YE

Left Rear Speaker Output (-)

B10

BU

Right Front Speaker Output (-)

B11

L-GN

Right Front Speaker Output (+)

B12

GN

Park Lamps Input

Radio C1 (w/U65 - Amplifier)


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: N/A
  • Description: L-GY

Radio C1 (w/U65 - Amplifier)

Pin

Wire

Function

A1-A7

--

Not Used

A8

PU

Left Front Speaker Output (+)

A9

PU

Left Front Speaker Output (-)

A10

WH

Right Rear Speaker Output (-)

A11

RD

Right Rear Speaker Output (+)

A12

BN

Ground G201

B1

BU/YE

Battery Positive Voltage

B2

GY

Ignition Positive Voltage

B3

BK

Antenna Amplifier Supply Voltage

B4

GN

LCD Backlighting Control

B5

WH/GN

LCD Backlighting Dim ground

B6

BK/WH

Sensitivity Control

B7

--

Not Used

B8

BK

Left Rear Speaker Output (+)

B9

YE

Left Rear Speaker Output (-)

B10

BU

Right Front Speaker Output (-)

B11

L-GN

Right Front Speaker Output (+)

B12

GN

Park Lamps Input

Radio C1 (w/UW5 - Navigation)


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: N/A
  • Description: L-GY

Radio C1 (w/UW5 - Navigation)

Pin

Wire

Function

A1

BU

Control Signal

A2-A7

--

Not Used

A8

PK

Left Front Speaker Output (+)

A9

PU

Left Front Speaker Output (-)

A10

WH

Right Rear Speaker Output (-)

A11

RD

right Rear Speaker Output (+)

A12

BN

Ground G201

B1

BU/WH

Battery Positive Voltage

B2

GY

Ignition Positive Voltage

B3

BK

Antenna Amplifier Supply Voltage

B4

GN

LCD Backlighting Control

B5

WH/BK

LCD Backlighting Dim ground

B6-B7

--

Not Used

B8

BK

Left Rear Speaker Output (+)

B9

YE

Left Rear Speaker Output (-)

B10

BU

Right Front Speaker Output (-)

B11

L-GN

Right Front Speaker Output (+)

B12

GN

Park Lamps Input

Radio C2 (w/U65 - Amplifier)


Object Number: 73151  Size: CH

Connector Part Information

  • OEM:12064799
  • Service: N/A
  • Description: BK

Radio C2 (w/U65 - Amplifier)

Pin

Wire

Function

A-E

--

Not Used

F

WH

Mute Control

G-M

--

Not Used

Radio C2 (w/UW5 - Navigation)


Object Number: 73151  Size: CH

Connector Part Information

  • 12064799
  • Service: N/A
  • Description: BK

Radio C2 (w/UW5 - Navigation)

Pin

Wire

Function

A

--

Not Used

B

RD/BK

Backup/Reverse Signal

C

BARE

Drain Wire

D

--

Not Used

E

PU/WH

Vehicle Speed Signal

F-G

--

Not Used

H

BK

Right Audio Input

J

WH

Left Audio Input

K

RD

Signal Ground

L-M

--

Not Used

Left Front Door Speaker (w/UW4, UW5)


Object Number: 334415  Size: CH

Connector Part Information

  • OEM: 90980-10935
  • Service: N/A
  • Description: WH

Left Front Door Speaker (w/UW4, UW5)

Pin

Wire

Function

1

PK

Positive

2

PU

Negative

Left Front Door Speaker (w/U65)


Object Number: 334415  Size: CH

Connector Part Information

  • OEM: 90980-10935
  • Service: N/A
  • Description: WH

Left Front Door Speaker (w/U65)

Pin

Wire

Function

1

RD

Positive

2

WH

Negative

Left Front Door Tweeter (w/U65)


Object Number: 1197316  Size: CH

Connector Part Information

  • OEM: 90980-10915
  • Service: N/A
  • Description: WH

Left Front Door Tweeter (w/U65)

Pin

Wire

Function

1

PK

Positive

2

PU

Negative

Right Front Door Speaker (All)


Object Number: 334415  Size: CH

Connector Part Information

  • OEM: 90980-10935
  • Service: N/A
  • Description: WH

Right Front Door Speaker (All)

Pin

Wire

Function

1

L-GN

Positive

2

BU

Negative

Right Front Door Tweeter (w/U65)


Object Number: 1197316  Size: CH

Connector Part Information

  • OEM: 90980-10915
  • Service: N/A
  • Description: WH

Right Front Door Tweeter (w/U65)

Pin

Wire

Function

1

L-GN

Positive

2

BU

Negative

Rear Door Speaker (All)


Object Number: 334415  Size: CH

Connector Part Information

  • OEM: 90980-10935
  • Service: N/A
  • Description: WH

Rear Door Speaker (All)

Pin

Wire

Function

1

RD

Positive

2

WH

Negative

Subwoofer (U65)


Object Number: 1304508  Size: CH

Connector Part Information

  • OEM: 90980-10941
  • Service: N/A
  • Description: WH

Subwoofer (U65)

Pin

Wire

Function

1

BU

Subwoofer Positive

2

L-GN

Subwoofer Negative

3

BK

Subwoofer Positive

4

YE

Subwoofer Negative

Vehicle Communication Interface Module - C1


Object Number: 339889  Size: CH

Connector Part Information

  • OEM: 90980-11391
  • Service: N/A
  • Description: GY

Vehicle Communication Interface Module - C1

Pin

Wire

Function

1

--

Not Used

2

BK/OG

Rearview Mirror Indicator

3

BK/YE

Rearview Mirror Illumination

4

--

Not Used

5

BK/WH

Ground

6

BK/RD

Accessory

7

--

Not Used

8

WH/BK

Ground

9-10

--

Not Used

11

BK/BU

Signal

12- 15

--

Not Used

16

BK

Battery Supply Voltage

Vehicle Communication Interface Module - C2


Object Number: 697023  Size: CH

Connector Part Information

  • OEM: 90980-11408
  • Service: N/A
  • Description: GY

Vehicle Communication Interface Module - C2

Pin

Wire

Function

1

BK

Speaker Output Positive

2

WH

Speaker Output Negative

3- 4

--

Not Used

5

BU/RD

Battery Positive Voltage

6-7

--

Not Used

8

BARE

Drain Wire

9

BK

Microphone Positive

10

BARE

Drain Wire

11- 12

--

Not Used

Vehicle Interface Unit


Object Number: 339889  Size: CH

Connector Part Information

  • OEM: 90980-AC001
  • Service: N/A
  • Description: BK

Vehicle Interface Unit

Pin

Wire

Function

1

BU/RD

Antenna Signal

2

BU/RD

Serial Data

3

BU/BK

Right Front Door Lock Actuator Signal

4

GN/YE

Horn Relay Signal

5

YE/BK

Hazard Switch Signal

6-8

--

Not Used

9

BU

SIR Voltage

10-11

--

Not Used

12

GY

Battery Positive Voltage

13

BK/WH

Ignition Switch - Start Voltage

14

BK

Battery Positive Voltage

15

WH/BK

Ground

16

--

Not Used