GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Transmission Fluid Temperature (TFT) Gage (UXT)
Table 2: Automatic Transmission Fluid Temperature (TFT) Sensor (Allison® LCT/UXT)
Table 3: Chime Module (UL5/UXZ)
Table 4: Differential Lock Switch (HNB/HPL/HPN)
Table 5: Driver Information Center (DIC)
Table 6: Engine Oil Level Switch (L18)
Table 7: Engine Oil Level Switch (LG4)
Table 8: Engine Oil Level Switch (LG5)
Table 9: Engine Oil Level Switch (LLY)
Table 10: Engine Oil Pressure (EOP) Sensor (L18)
Table 11: Engine Oil Pressure (EOP) Sensor (LG4)
Table 12: Engine Oil Pressure (EOP) Sensor (LG5)
Table 13: Engine Oil Pressure (EOP) Sensor (LLY)
Table 14: Fuel Sender - Secondary (Dual Tanks/LG4/LG5/LLY)
Table 15: Fuel Sender (Dual Tanks/L18)
Table 16: Fuel Sender (LG4/LG5/LLY)
Table 17: Instrument Panel Cluster (IPC)
Table 18: Inter-Axle Differential Lock Switch (Tandem Axle)
Table 19: Rear Axle Shift Switch - Two Speed (HR1/HR2)
Table 20: Water-In-Fuel Sensor (LG4/LG5/KUK/NWB)
Table 21: Water-In-Fuel Sensor (LLY/NWB)

Automatic Transmission Fluid Temperature (TFT) Gage (UXT)


Object Number: 40422  Size: CH

Connector Part Information

    • 12064762
    • 6-Way F Metri-Pack 150 Series (GY)

Pin

Wire Color

Circuit No.

Function

A

PK

39

Ignition 1 Voltage

B

--

--

Not Used

C

TN/WH

585

Transmission Oil Temperature Sensor Signal

D

BK

450

Ground

E

--

--

Not Used

F

GY

8

Instrument Panel Lamp Supply Voltage - 1

Automatic Transmission Fluid Temperature (TFT) Sensor (Allison® LCT/UXT)


Object Number: 646180  Size: CH

Connector Part Information

    • 12162198
    • 2-Way F Metri-Pack 150.2 Series, Sealed Pull To Seat (GY)

Pin

Wire Color

Circuit No.

Function

A

TN/WH

585

Transmission Oil Temperature Sensor Signal

B

BK/WH

351

Ground

Chime Module (UL5/UXZ)


Object Number: 73156  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

D-BU/WH

653

Chime Module Bit 1 Signal

A2-A11

--

--

Not Used

A12

BK

750

Ground

B1

OG

1140

Battery Positive Voltage

B2-B12

--

--

Not Used

Differential Lock Switch (HNB/HPL/HPN)


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-GN

2659

Rear Differential Lock-High-Control

B

BK

750

Ground

Driver Information Center (DIC)


Object Number: 130690  Size: CH

Connector Part Information

    • 12110206
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1-A3

--

--

Not Used

A4

D-BU

2769

Brake Indicator Signal (JE3)

A5

TN

185

Low Washer Fluid Indicator Control

A6-A8

--

--

Not Used

A9

YE/BK

508

Water In Fuel Indicator Control (Diesel)

A10

BK

750

Ground

A11

BK/WH

1962

Engine Brake Solenoid - Feed (Diesel)

A12

--

--

Not Used

B1-B2

--

--

Not Used

B3

L-BU

1998

Intake Air Heater Indicator Control (LG5)

D-BU

507

Wait to Start Indicator Control (LLY)

--

--

Not Used (L18/LG4)

B4

BN

25

Charge Indicator Control (LG4/LG5)

B5

L-GN

2659

Rear Differential Lock-High-Control (JE4)

B6

PK

39

Ignition 1 Voltage

B7

--

--

Not Used

B8

GY

1234

Do Not Shift Indicator Control

B9

--

--

Not Used

B10

WH

471

Trailer ABS Indicator Control (JE4)

B11-B12

--

--

Not Used

Engine Oil Level Switch (L18)


Object Number: 635009  Size: CH

Connector Part Information

    • 12052641
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BN

1174

Oil Level Switch Signal

B

L-GN/WH

250

Ground

Engine Oil Level Switch (LG4)


Object Number: 246685  Size: CH

Connector Part Information

    • 7323-7414-40
    • 1-Way F Yazaki Sealed (L-GY)

Pin

Wire Color

Circuit No.

Function

A

D-GN

B52

Oil Level Switch Signal

Engine Oil Level Switch (LG5)


Object Number: 635009  Size: CH

Connector Part Information

    • --
    • 2-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

GY

G458

Oil Level Switch Signal

B

WH

G828

Ground

Engine Oil Level Switch (LLY)


Object Number: 684833  Size: CH

Connector Part Information

    • 12129140
    • 2-Way F Metri-Pack 280.1 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

BN

IC68

Oil Level Switch Signal

B

L-GN/WH

IC69

Ground

Engine Oil Pressure (EOP) Sensor (L18)


Object Number: 726824  Size: CH

Connector Part Information

    • 15344137
    • 3-Way F GT 150 Series, Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

407

Low Reference

2

TN/WH

332

Oil Pressure Sensor Signal

3

GY

705

5-Volt Reference

Engine Oil Pressure (EOP) Sensor (LG4)


Object Number: 1428077  Size: CH

Connector Part Information

    • 61890099
    • 3-Way F Sumitomo, Sealed (BK)

Pin

Wire Color

Circuit No

Function

1

BK/YE

B14

Low Reference

2

GY

B27

Oil Pressure Sensor Signal

3

WH

B48

5-Volt Reference

Engine Oil Pressure (EOP) Sensor (LG5)


Object Number: 258299  Size: CH

Connector Part Information

    • 12065287
    • 3-Way F Metri-Pack 150 Series, Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

BN

826

5-Volt Reference

B

BU

827

Low Reference

C

GY

994

Oil Pressure Sensor Signal

Engine Oil Pressure (EOP) Sensor (LLY)


Object Number: 1428077  Size: CH

Connector Part Information

    • 61890099
    • 3-Way F Sumitomo (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

IC71

Low Reference

2

TN/WH

IC66

Oil Pressure Sensor Signal

3

GY

IC57

5-Volt Reference

Fuel Sender - Secondary (Dual Tanks/LG4/LG5/LLY)


Object Number: 697003  Size: CH

Connector Part Information

    • 15324862
    • 4-Way F FCI Apex Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BK

470

Low Reference

3

--

--

Not Used

4

D-BU

1936

Fuel Level Sensor Signal - Secondary

Fuel Sender (Dual Tanks/L18)


Object Number: 697003  Size: CH

Connector Part Information

    • 15324862
    • 4-Way F FCI Apex Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BK

470

Low Reference

3

--

--

Not Used

4

D-BU

1936

Fuel Level Sensor Signal - Secondary

Fuel Sender (LG4/LG5/LLY)


Object Number: 697003  Size: CH

Connector Part Information

    • 15324862
    • 4-Way F FCI Apex Series Sealed (GY)

Pin

Wire Color

Circuit No.

Function

1

GY

--

Not Used

2

BK

470

Low Reference

3

BK

--

Not Used

4

PU

1936

Fuel Level Sensor Signal - Secondary

Instrument Panel Cluster (IPC)


Object Number: 62478  Size: CH

Connector Part Information

    • 12065803
    • 34-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

A1-A3

--

--

Not Used

A4

OG

1140

Battery Positive Voltage

A5-A6

--

--

Not Used

A7

D-BU

15

Right Turn Signal Lamps Supply Voltage Right Turn

A8

BK

750

Ground

A9

GY

8

Instrument Panel Lamp Supply Voltage - 1

A10

L-BU

14

Left Turn Signal Lamps Supply Voltage

A11

L-GN

11

Headlamp High Beam Supply Voltage

A12

PK

39

Ignition 1 Voltage

A13

BN/WH

419

MIL Control

A14

PU/WH

1382

LED Dimming Signal

A15

GY

1036

IPC Class 2 Serial Data

A16-A17

--

--

Not Used

B1-B4

--

--

Not Used

B5

PK

1020

Off/Run/Crank Voltage

B6

YE

43

Accessory Voltage

B7

L-GN

80

Key In Ignition Switch Signal

B8

BK/WH

746

Right Front Door Ajar Switch Signal

B9

BN

9

Park Lamp Supply Voltage

B10

L-BU

1134

Park Brake Switch Signal

B11

L-GN/BK

592

DRL Relay Control

B12

D-GN/WH

2662

Low Air Pressure Alarm Switch (JE4)

--

--

Not Used (JE3)

B13

WH

121

Engine Speed Signal

B14

D-GN/WH

817

Vehicle Speed Signal

B15

BK/WH

1451

Ground

B16-B17

--

--

Not Used

Inter-Axle Differential Lock Switch (Tandem Axle)


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

L-GN

2659

Rear Differential Lock-High-Control

B

BK

750

Ground

Rear Axle Shift Switch - Two Speed (HR1/HR2)


Object Number: 876326  Size: CH

Connector Part Information

    • 12065402
    • 2-Way F Metri-Pack 150 Series (BN)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Available

C

GY/BK

1467

Air Shift Switch Signal

D

BK

250

Ground

Water-In-Fuel Sensor (LG4/LG5/KUK/NWB)


Object Number: 523630  Size: CH

Connector Part Information

    • 15326801
    • 2-Way F GT 150 Series, Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

YE/BK

508

Water In Fuel Indicator Control

B

BK/WH

351

Ground

Water-In-Fuel Sensor (LLY/NWB)


Object Number: 523630  Size: CH

Connector Part Information

    • 15326801
    • 2-Way F GT 150 Series, Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

YE/BK

508

Water In Fuel Indicator Control

B

BK/WH

351

Ground