GM Service Manual Online
For 1990-2009 cars only
Connector 1: Dimmer/Head Up Display (HUD) Switch
Connector 2: Driver Information Center (DIC) Switch
Connector 3: Engine Oil Level Switch (4.6L)
Connector 4: Engine Oil Level/Temperature Sensor (4.4L)
Connector 5: Engine Oil Pressure (EOP) Sensor
Connector 6: Fuel Level Sensor - Right
Connector 7: Head Up Display
Connector 8: Instrument Panel Cluster (IPC) - C1
Connector 9: Instrument Panel Cluster (IPC) - C2
Connector 10: Instrument Panel Cluster (IPC) - C3

Dimmer/Head Up Display (HUD) Switch


Object Number: 258245  Size: CH

Connector Part Information

  • OEM: 12065872
  • Service: 12101845
  • Description: 7-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Dimmer/Head Up Display (HUD) Switch

Pin

Wire Color

Circuit No.

Function

1

YE

--

Ground

2

GY

--

HUD Image Up Signal

3

BN

--

HUD Image Down Signal

4

WH

--

Instrument Panel Lamps Dimmer Select Switch Signal

5

GN

--

Instrument Panel Lamps Dimmer Switch Down Signal

6

OG

--

Instrument Panel Lamps Supply Voltage

7

BU

--

Instrument Panel Lamps Dimmer Switch Up Signal

Driver Information Center (DIC) Switch


Object Number: 258245  Size: CH

Connector Part Information

  • OEM: 12065872
  • Service: 12101845
  • Description: 7-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Driver Information Center (DIC) Switch

Pin

Wire Color

Circuit No.

Function

1

YE

--

DIC Information Up Switch Signal

2

BU

--

Instrument Panel Lamps Supply Voltage

3

GN

--

DIC Information Down Switch Signal

4

WH

--

Dome Lamp Switch Signal

5

OG

--

DIC Options Switch Signal

6

BN

--

DIC Reset Switch Signal

7

GY

--

Ground

Engine Oil Level Switch (4.6L)


Object Number: 635009  Size: CH

Connector Part Information

  • OEM: 12052641
  • Service: 12102747
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12048074/2
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Engine Oil Level Switch (4.6L)

Pin

Wire Color

Circuit No.

Function

A

BN

1174

Oil Level Switch Signal

B

BK

1250

Ground

Engine Oil Level/Temperature Sensor (4.4L)


Object Number: 646415  Size: CH

Connector Part Information

  • OEM: 15326808
  • Service: 15306388
  • Description: 3-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12191819/8
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Engine Oil Level/Temperature Sensor (4.4L)

Pin

Wire Color

Circuit No.

Function

A

BN

1174

Oil Level Switch Signal

B

D-GN/WH

357

Oil Temperature Sensor Signal

C

BN

6273

Low Reference

Engine Oil Pressure (EOP) Sensor


Object Number: 646409  Size: CH

Connector Part Information

  • OEM: 15336121
  • Service: 88953362
  • Description: 3-Way F GT 150 Series Sealed (BK)

Terminal Part Information

  • Terminal/Tray: 15326267/19
  • Core/Insulation Crimp: E/4
  • Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Engine Oil Pressure (EOP) Sensor

Pin

Wire Color

Circuit No.

Function

A

BK

2755

Low Reference

B

TN/WH

331

Oil Pressure Sensor Signal

C

GY

2705

5-Volt Reference - 1

Fuel Level Sensor - Right


Object Number: 697003  Size: CH

Connector Part Information

  • OEM: 15324862
  • Service: 15306441
  • Description: 4-Way F Metri-Pack 150.2 Series (BK)

Terminal Part Information

  • Terminal/Tray: 54001800/22
  • Core/Insulation Crimp: 2/4
  • Release Tool/Test Probe: 12094429/J--35616-4A (PU)

Fuel Level Sensor - Right

Pin

Wire Color

Circuit No.

Function

1

L-BU

1937

Fuel Level Sensor Signal - Secondary

2

--

--

Not Used

3

BK/WH

850

Ground

4

BK

808

Low Reference

Head Up Display


Object Number: 850857  Size: CH

Connector Part Information

  • OEM: 15341086
  • Service: 88986454
  • Description: 12-Way F Multi-Lock (BK)

Terminal Part Information

  • Terminal/Tray: 173681-2/17
  • Core/Insulation Crimp: E/4
  • Release Tool/Test Probe: 15315247/J-35616-16 (L-GN)

Head Up Display

Pin

Wire Color

Circuit No.

Function

1

RD/WH

1140

Battery Positive Voltage

2

--

--

Not Used

3

BN

2383

HUD Image Up Signal

4

PK

2384

HUD Image Down Signal

5

--

--

Not Used

6

YE

1127

HUD Class 2 Serial Data

7-9

--

--

Not Used

10

BK

1450

Ground

11

D-GN/WH

817

Vehicle Speed Signal

12

--

--

Not Used

Instrument Panel Cluster (IPC) - C1


Object Number: 62478  Size: CH

Connector Part Information

  • OEM: 12065803
  • Service: 12065803
  • Description: 34-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Instrument Panel Cluster (IPC) - C1

Pin

Wire Color

Circuit No.

Function

A1

BN/WH

230

Instrument Panel Lamps Dimming Control

A2

YE

390

Instrument Panel Lamp Supply Voltage 3

A3-A4

--

--

Not Used

A5

GY

1036

IPC Class 2 Serial Data

A6-A9

--

--

Not Used

A10

BK

1450

Ground

A11

--

--

Not Used

A12

RD/WH

1140

Battery Positive Voltage

A13

--

--

Not Used

A14

WH

121

Engine Speed Signal

A15

D-GN/WH

817

Vehicle Speed Signal

A16

BN

9

Park Lamp Supply Voltage

A17

TN/WH

99

Windshield Washer Fluid Level Signal

B1

BN

27

Hazard Flasher Signal

B2-B3

--

--

Not Used

B4

PK

2384

HUD Image Down Signal

B5

BN

2383

HUD Image Up Signal

B6-B13

--

--

Not Used

B14

BN/WH

419

Check Engine Indicator Control

B15

L-BU

1134

Park Brake Switch Signal

B16

PU

333

Brake Fluid Level Sensor Signal

B17

--

--

Not Used

Instrument Panel Cluster (IPC) - C2


Object Number: 1758587  Size: CH

Connector Part Information

  • OEM: 51024-0700
  • Service: Service by Harness - See Part Catalog
  • Description: 7-Way F Molex 2.5MM Low Profile (WH)

Terminal Part Information

  • Terminal/Tray:See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Instrument Panel Cluster (IPC) - C2

Pin

Wire Color

Circuit No.

Function

1

YE

--

DIC Information Up Switch Signal

2

BU

--

Instrument Panel Lamps Supply Voltage

3

GN

--

DIC Information Down Switch Signal

4

WH

--

Dome Lamp Switch Signal

5

BN

--

DIC Reset Switch Signal

6

OG

--

DIC Options Switch Signal

7

GY

--

Ground

Instrument Panel Cluster (IPC) - C3


Object Number: 1758587  Size: CH

Connector Part Information

  • OEM: 51024-0700
  • Service: Service by Harness - See Part Catalog
  • Description: 7-Way F Molex 2.5MM Low Profile (WH)

Terminal Part Information

  • Terminal/Tray:See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Instrument Panel Cluster (IPC) - C3

Pin

Wire Color

Circuit No.

Function

1

YE

--

Ground

2

BU

--

Instrument Panel Lamps Dimmer Switch Up Signal

3

GN

--

Instrument Panel Lamps Dimmer Switch Down Signal

4

WH

--

Instrument Panel Lamps Dimmer Select Switch Signal

5

BN

--

HUD Image Down Signal

6

OG

--

Instrument Panel Lamps Supply Voltage

7

GY

--

HUD Image Up Signal