GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Oil Level Switch (w/LH2)
Connector 2: Engine Oil Level and Temperature Sensor (LC3)
Connector 3: Engine Oil Pressure (EOP) Sensor (w/LH2)
Connector 4: Engine Oil Pressure (EOP) Sensor (w/LY7)
Connector 5: Fuel Pump and Sender Assembly
Connector 6: Secondary Fuel Sender Assembly
Connector 7: Head-Up Display (HUD) (w/UV6)
Connector 8: Instrument Panel Cluster (IPC)
Connector 9: I/P Dimmer Switch (w/UV6)
Connector 10: I/P Dimmer Switch (w/o UV6)

Engine Oil Level Switch (w/LH2)


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 (w/LH2)

Pin

Wire Color

Circuit No.

Function

A

BN

1174

Oil Level Switch Signal

B

BK/WH

1551

Signal Ground

Engine Oil Level and Temperature Sensor (LC3)


Object Number: 646415  Size: CH

Connector Part Information

  • OEM: 15326808
  • Service: 15306388
  • Description: 3-Way F GT 150 Series Sealed 4.5 (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 and Temperature Sensor (LC3)

Pin

Wire Color

Circuit No.

Function

A

BN

1174

Oil Level Sensor Signal

B

D-GN/WH

357

Oil Temperature Sensor Signal

C

BN

6273

Oil Temperature Sensor Low Reference

Engine Oil Pressure (EOP) Sensor (w/LH2)


Object Number: 646409  Size: CH

Connector Part Information

  • OEM: 15336121
  • Service: 88953362
  • Description: 3-Way F GT 150 Series Sealed 3.2 X 4.0 (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 (w/LH2)

Pin

Wire Color

Circuit No.

Function

A

BK

2755

Oil Pressure Sensor Low Reference

B

TN/WH

331

Oil Pressure Sensor Signal

C

GY

2705

Oil Pressure Sensor 5-Volt Reference

Engine Oil Pressure (EOP) Sensor (w/LY7)


Object Number: 258299  Size: CH

Connector Part Information

  • OEM: 12065287
  • Service: 88988301
  • Description: 3-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

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

Engine Oil Pressure (EOP) Sensor (w/LY7)

Pin

Wire Color

Circuit No.

Function

A

TN

470

Sensor Return

B

GY

605

Reference Voltage Feed 5-Volt Reference

C

TN/BK

231

Oil Pressure Switch Signal

Fuel Pump and Sender Assembly


Object Number: 456551  Size: CH

Connector Part Information

  • OEM: 12160482
  • Service: 88988598
  • Description: 4-Way F Metri-Pack 150 Series Sealed (BK)

Terminal Part Information

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

Fuel Pump and Sender Assembly

Pin

Wire Color

Circuit No.

Function

A

D-BU

1936

Fuel Level Sensor Signal

B

GY

120

Fuel Pump Supply Voltage

C

BK

1050

Ground

D

BK

2759

Fuel Tank Pressure Sensor Low Reference

Secondary Fuel Sender Assembly


Object Number: 684847  Size: CH

Connector Part Information

  • OEM: 12160563
  • Service: 12160563
  • Description: 4-Way F Metri-Pack 150 Series Sealed (WH)

Terminal Part Information

  • Pins: A, D
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Secondary Fuel Sender Assembly

Pin

Wire Color

Circuit No.

Function

A

L-BU

1937

Secondary Fuel Level Sensor Signal

B-C

--

--

Not Used

D

TN

2759

Fuel Tank Pressure Sensor Low Reference

Head-Up Display (HUD) (w/UV6)


Object Number: 1283869  Size: CH

Connector Part Information

  • OEM: 175965-2
  • Service: 88986454
  • Description: 12-Way F 040 Multilock Mark II Series (BK)

Terminal Part Information

  • Pins: 1, 3, 4, 5, 10, 11, 12
  • Terminal/Tray: 173681-2/17
  • Core/Insulation Crimp: E/4
  • Release Tool/Test Probe: 15315247/J-35616-16 (L-GN)

Head-Up Display (HUD) (w/UV6)

Pin

Wire Color

Circuit No.

Function

1

RD/WH

1640

Battery Positive Voltage

2

--

--

Not Used

3

D-GN

5060

Low Speed GMLAN Serial Data

4

PK

2384

Night Vision Image Up Signal

5

L-GN/BK

5699

Head Up Display Switch Low Reference

6-9

--

--

Not Used

10

BN

2383

Night Vision Image Down Signal

11

TN

2382

Night Vision Image Dimming Signal

12

BK/WH

351

Signal Ground

Instrument Panel Cluster (IPC)


Object Number: 1468761  Size: CH

Connector Part Information

  • OEM: 1326042-1
  • Service: 88987996
  • Description: 26-Way F 90 Series AMP (BK)

Terminal Part Information

  • Pins: 1, 3, 5, 8, 9, 12, 13, 20, 2, 21
  • Terminal/Tray: 638551-1/16
  • Core/Insulation Crimp: Pins 1, 3, 5, 8, 9, 12, 13, 20 - J/J
  • Core/Insulation Crimp: Pins 2, 21 - K/K
  • Release Tool/Test Probe: 15315247/J-35616-64B (L-BU)

Instrument Panel Cluster (IPC)

Pin

Wire Color

Circuit No.

Function

1

RD/WH

1440

Battery Positive Voltage

2

PK

239

Run/Crank Ignition 1 Voltage

3

D-GN

5060

Low Speed GMLAN Serial Data

4

--

--

Not Used

5

BK/WH

351

Ground

6-7

--

--

Not Used

8

PU

333

Brake Fluid Level Sensor Signal

9

BN/WH

419

Check Engine Indicator Control

10-11

--

--

Not Used

12

D-GN/WH

1358

Driver Information Center Switch Signal

13

BN

897

Driver Information Center Switch Low Reference

14-19

--

--

Not Used

20

D-BU

894

Driver Information Center Toggle Switch Signal

21

PU

5234

Passenger Seat Belt Indicator Control

22-26

--

--

Not Used

I/P Dimmer Switch (w/UV6)


Object Number: 1492425  Size: CH

Connector Part Information

  • OEM: HCMPB-12-K
  • Service: 88988295
  • Description: 12-Way F JST (BK)

Terminal Part Information

  • Terminal/Tray: SHCM-A03T-P025/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

I/P Dimmer Switch (w/UV6)

Pin

Wire Color

Circuit No.

Function

1

D-GN

44

Low Reference

2

L-BU/BK

1688

Instrument Panel Lamp Dimmer Switch Signal

3

PK/BK

1597

Interior Lamp Switch On Signal

4

TN

2382

Night Vision Image Dimming Signal

5

L-GN/BK

5699

Head Up Display Switch Low Reference

6

BN

2383

Night Vision Image Down Signal

7

PK

2384

Night Vision Image Up Signal

8

BN

897

Driver Information Center Switch Low Reference

9

D-GN/WH

1358

Driver Information Center Switch Signal

10

D-BU

894

Driver Information Center Toggle Switch Signal

11

YE

1491

Backlight Lamp Control

12

BK/WH

351

Ground

I/P Dimmer Switch (w/o UV6)


Object Number: 1492423  Size: CH

Connector Part Information

  • OEM: HCMPB-A12-S
  • Service: 88988294
  • Description: 12-Way F JST (WH)

Terminal Part Information

  • Pins: 1, 2, 3, 8, 9, 10, 11, 12
  • Terminal/Tray: SHCM-A03T-P025/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

I/P Dimmer Switch (w/o UV6)

Pin

Wire Color

Circuit No.

Function

1

D-GN

44

Low Reference

2

L-BU/BK

1688

Instrument Panel Lamp Dimmer Switch Signal

3

PK/BK

1597

Interior Lamp Switch On Signal

4-7

--

--

Not Used

8

BN

897

Driver Information Center Switch Low Reference

9

D-GN/WH

1358

Driver Information Center Switch Signal

10

D-BU

894

Driver Information Center Toggle Switch Signal

11

YE

1491

Backlight Lamp Control

12

BK/WH

351

Ground