GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Express 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Lighting Systems Connector End Views
Table 1: Center High Mounted Stop Lamp (CHMSL) (Passenger/Cargo)
Table 2: Courtesy/Reading Lamp - Front
Table 3: Courtesy/Reading Lamp - Mid (Passenger/Cargo)
Table 4: Courtesy/Reading Lamp - Rear (Passenger/Cargo)
Table 5: Dome Fluorescent Work Lamps (PNP w/UF2)
Table 6: Dome Lamp - Rear (Cargo)
Table 7: Door Ajar Switch - LR (E26)
Table 8: Door Ajar Switch - RR (Passenger/Cargo)
Table 9: Headlamp - High Beam - Left (Composite)
Table 10: Headlamp - High Beam - Right (Composite)
Table 11: Headlamp - Left (Sealed)
Table 12: Headlamp - Low Beam - Left (Composite)
Table 13: Headlamp - Low Beam - Right (Composite)
Table 14: Headlamp - Right (Sealed)
Table 15: Headlamp and Panel Dimmer Switch - C1
Table 16: License Lamp (Passenger/Cargo - Early Production)
Table 17: License Lamp (Passenger/Cargo - Late Production)
Table 18: Marker Lamp - LF
Table 19: Marker Lamp - RF
Table 20: Mini Wedge (Door Jamb Switch) - Cargo - C1
Table 21: Mini Wedge (Door Jamb Switch) - Driver - C1
Table 22: Mini Wedge (Door Jamb Switch) - Front Passenger - C1
Table 23: Park/Turn Signal Lamp - LF
Table 24: Park/Turn Signal Lamp - RF
Table 25: Stop Lamp Switch
Table 26: Tail Lamp Assembly - Left (Passenger/Cargo)
Table 27: Tail Lamp Assembly - Right (Passenger/Cargo)
Table 28: Trailer Stop/Turn Relay - Left (UY7)
Table 29: Trailer Stop/Turn Relay - Right (UY7)
Table 30: Turn Signal/Hazard Flasher Module
Table 31: Turn Signal/Multifunction Switch - C1
Table 32: Turn Signal/Multifunction Switch - C2
Table 33: Turn Signal/Multifunction Switch - C3
Table 34: Turn Signal/Multifunction Switch - C4 (K34)
Table 35: Underhood Lamp
Table 36: Vanity Mirror Lamp - Left (DH6)
Table 37: Vanity Mirror Lamp - Right (DH6)

Center High Mounted Stop Lamp (CHMSL) (Passenger/Cargo)


Object Number: 35441 Size: CH

Connector Part Information
    • 12047663
    • 2-Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

1320

CHMSL Supply Voltage

B

BLK

850

Ground

Courtesy/Reading Lamp - Front


Object Number: 333035 Size: CH

Connector Part Information
    • 12047781
    • 3-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

B

BLK

450

Ground

C

ORN

1732

Inadvertent Power Supply Voltage

Courtesy/Reading Lamp - Mid (Passenger/Cargo)


Object Number: 333035 Size: CH

Connector Part Information
    • 12047781
    • 3-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

B

BLK

450

Ground

C

ORN

1732

Inadvertent Power Supply Voltage

Courtesy/Reading Lamp - Rear (Passenger/Cargo)


Object Number: 333035 Size: CH

Connector Part Information
    • 12047781
    • 3-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

B

BLK

450

Ground

C

ORN

1732

Inadvertent Power Supply Voltage

Dome Fluorescent Work Lamps (PNP w/UF2)


Object Number: 280768 Size: CH

Connector Part Information
    • 12052832
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

840

Battery Positive Voltage

B

BLK

150

Ground

Dome Lamp - Rear (Cargo)


Object Number: 68722 Size: CH

Connector Part Information
    • 15528758
    • 2-Way F Dome Lamp Base (NAT)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

B

BLK

850

Ground

Door Ajar Switch - LR (E26)


Object Number: 35451 Size: CH

Connector Part Information
    • 12059251
    • 2-Way F Metri-Pack 150 Series (RED)

Pin

Wire Color

Circuit No.

Function

A

BLK

450

Ground

B

YEL/BLK

1181

Rear Door Open Switch Signal

Door Ajar Switch - RR (Passenger/Cargo)


Object Number: 35451 Size: CH

Connector Part Information
    • 12059251
    • 2-Way F Metri-Pack 150 Series (RED)

Pin

Wire Color

Circuit No.

Function

A

BLK

450

Ground

B

YEL/BLK

1181

Rear Door Open Switch Signal

Headlamp - High Beam - Left (Composite)


Object Number: 684797 Size: CH

Connector Part Information
    • 12059183
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN/WHT

711

Left Headlamp High Beam Supply Voltage

B

BLK

250

Ground

Headlamp - High Beam - Right (Composite)


Object Number: 684797 Size: CH

Connector Part Information
    • 12059183
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

311

Right Headlamp High Beam Supply Voltage

B

BLK

650

Ground

Headlamp - Left (Sealed)


Object Number: 306269 Size: CH

Connector Part Information
    • 12034372
    • 3-Way F Metri-Pack 800 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

250

Ground

B

DK GRN/WHT

711

Left Headlamp High Beam Supply Voltage

C

YEL

712

Left Headlamp Low Beam Supply Voltage

Headlamp - Low Beam - Left (Composite)


Object Number: 684796 Size: CH

Connector Part Information
    • 12059181
    • 2-Way F Metri-Pack 280 Series SLD (GRY)

Pin

Wire Color

Circuit No.

Function

A

YEL

712

Left Headlamp Low Beam Supply Voltage

B

BLK

250

Ground

Headlamp - Low Beam - Right (Composite)


Object Number: 684796 Size: CH

Connector Part Information
    • 12059181
    • 2-Way F Metri-Pack 280 Series SLD (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN/WHT

312

Right Headlamp Low Beam Supply Voltage

B

BLK

650

Ground

Headlamp - Right (Sealed)


Object Number: 306269 Size: CH

Connector Part Information
    • 12034372
    • 3-Way F Metri-Pack 800 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

650

Ground

B

LT GRN/BLK

311

Right Headlamp High Beam Supply Voltage

C

TAN/WHT

312

Right Headlamp Low Beam Supply Voltage

Headlamp and Panel Dimmer Switch - C1


Object Number: 647976 Size: CH

Connector Part Information
    • 15332161
    • 12-Way F GT 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

705

5 Volt Reference

B

BRN/WHT

230

Instrument Panel Lamps Dimming Control

C

BLK

350

Ground

D

WHT

103

Headlamp Switch Headlamps On Signal

E

BRN/WHT

301

Park Lamp Switch On Signal

F

DK GRN

306

DRL On/Off Signal

G

ORN/BLK

2090

Dimming Input

H

GRY/BLK

2226

Dimming Return

J

DK BLU/WHT

1495

Courtesy Lamps On Signal

K

PPL/WHT

1382

LED Dimming Signal

L

PNK

1348

Headlamp On Indicator Supply Voltage

M

PPL

328

Interior Lamp Defeat Switch Signal

License Lamp (Passenger/Cargo - Early Production)


Object Number: 287969 Size: CH

Connector Part Information
    • 12162082
    • 2-Way F Bulb Base- Type W-2- Axial (NAT)

Pin

Wire Color

Circuit No.

Function

A

BRN

2509

Left Rear Park Lamps Supply Voltage

B

BLK

1050

Ground

License Lamp (Passenger/Cargo - Late Production)


Object Number: 744036 Size: CH

Connector Part Information
    • 12110053
    • 2-Way F Wedge Base- Type W-2 Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

BRN

2509

Left Rear Park Lamps Supply Voltage

B

BLK

1050

Ground

Marker Lamp - LF


Object Number: 68721 Size: CH

Connector Part Information
    • 15300027
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

2309

Front Park Lamps Supply Voltage

B

BLK

250

Ground

Marker Lamp - RF


Object Number: 68721 Size: CH

Connector Part Information
    • 15300027
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

2309

Front Park Lamps Supply Voltage

B

BLK

650

Ground

Mini Wedge (Door Jamb Switch) - Cargo - C1


Object Number: 684948 Size: CH

Connector Part Information
    • 15354716
    • 4-Way F GT 150 Sealed 3.2 X 4.0 (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1177

Door Open Switch Signal

B-C

--

--

Not Used

D

BLK

1050

Ground

Mini Wedge (Door Jamb Switch) - Driver - C1


Object Number: 684948 Size: CH

Connector Part Information
    • 15354716
    • 4-Way F GT 150 Sealed 3.2 X 4.0 (BLK)

Pin

Wire Color

Circuit No.

Function

A

TAN

126

Left Front Door Open Switch Signal

B-C

--

--

Not Used

D

BLK

450

Ground

Mini Wedge (Door Jamb Switch) - Front Passenger - C1


Object Number: 684948 Size: CH

Connector Part Information
    • 15354716
    • 4-Way F GT 150 Sealed 3.2 X 4.0 (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

450

Ground

B-C

--

--

Not Used

D

LT GRN

1177

Door Open Switch Signal

Park/Turn Signal Lamp - LF


Object Number: 847206 Size: CH

Connector Part Information
    • 12040977
    • 3-Way F M/P 280 SLD (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

2114

Left Front Turn Signal Lamps Supply Voltage

B

BRN

2309

Front Park Lamps Supply Voltage

C

BLK

250

Ground

Park/Turn Signal Lamp - RF


Object Number: 847206 Size: CH

Connector Part Information
    • 12040977
    • 3-Way F M/P 280 SLD (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

2115

Right Front Turn Signal Lamps Supply Voltage

B

BRN

2309

Front Park Lamps Supply Voltage

C

BLK

650

Ground

Stop Lamp Switch


Object Number: 62424 Size: CH

Connector Part Information
    • 12040551
    • 6-Way F Metri-Pack 480 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

17

Stop Lamp Switch Signal

B

RED/WHT

1540

Battery Positive Voltage

C

PNK

739

Ignition 1 Voltage

D

PPL

420

TCC Brake Switch/Cruise Control Release Signal

E

LT GRN/BLK

584

A/T Shift Lock Control Switch Supply Voltage

F

DK GRN/WHT

1135

A/T Shift Lock Control Solenoid Supply Voltage

Tail Lamp Assembly - Left (Passenger/Cargo)


Object Number: 39689 Size: CH

Connector Part Information
    • 12064754
    • 6-Way M Metri-Pack 280 Series- Self Lock (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

2509

Left Rear Park Lamps Supply Voltage

BRN

2509

Left Rear Park Lamps Supply Voltage

B

YEL

618

Left Rear Turn Signal Lamp Supply Voltage

C

--

--

Not Used

D

BLK

850

Ground

E

--

--

Not Used

F

LT GRN

24

Backup Lamp Supply Voltage

Tail Lamp Assembly - Right (Passenger/Cargo)


Object Number: 39689 Size: CH

Connector Part Information
    • 12064754
    • 6-Way M Metri-Pack 280 Series- Self Lock (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

2609

Right Rear Park Lamps Supply Voltage

B

DK GRN

619

Right Rear Turn Signal Lamp Supply Voltage

C

--

--

Not Used

D

BLK

1050

Ground

E

--

--

Not Used

F

LT GRN

24

Backup Lamp Supply Voltage

Trailer Stop/Turn Relay - Left (UY7)


Object Number: 535912 Size: CH

Connector Part Information
    • 12129716
    • 4-Way F Metri-Pack 280 Series Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

30

RED/WHT

1340

Battery Positive Voltage

85

YEL

618

Left Rear Turn Signal Lamp Supply Voltage

86

BLK

150

Ground

87

YEL

1618

Trailer Left Rear Turn/Stop Lamp Supply Voltage

Trailer Stop/Turn Relay - Right (UY7)


Object Number: 535912 Size: CH

Connector Part Information
    • 12129716
    • 4-Way F Metri-Pack 280 Series Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

30

RED/WHT

1340

Battery Positive Voltage

85

DK GRN

619

Right Rear Turn Signal Lamp Supply Voltage

86

BLK

150

Ground

87

DK GRN

1619

Trailer Right Rear Turn/Stop Lamp Supply Voltage

Turn Signal/Hazard Flasher Module


Object Number: 800518 Size: CH

Connector Part Information
    • 15332177
    • 16-Way F GT 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

5364

Left DRL/Turn Supply Voltage

B

YEL

18

Left Rear Stop/Turn Lamp Supply Voltage

C

LT GRN/BLK

592

DRL Low Control

D

DK GRN

19

Right Rear Stop/Turn Lamp Supply Voltage

E

DK GRN

5365

Right DRL/Turn Supply Voltage

F

WHT

17

Stop Lamp Switch Signal

G

LT BLU/WHT

1314

Left Front Turn Signal Lamp Supply Voltage

H

DK BLU/WHT

1315

Right Front Turn Signal Lamp Supply Voltage

J

RED/WHT

540

Battery Positive Voltage

K

WHT

111

Hazard Switch Signal

L

LT BLU/WHT

1414

Left Turn Signal Switch Signal

M

DK BLU/WHT

1415

Right Turn Signal Switch Signal

N

BLK

350

Ground

P-S

--

--

Not Used

Turn Signal/Multifunction Switch - C1


Object Number: 39746 Size: CH

Connector Part Information
    • 12064862
    • 8-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

1415

Right Turn Signal Switch Signal

B

PNK

739

Ignition 1 Voltage

C

LT BLU/WHT

1414

Left Turn Signal Switch Signal

D-F

--

--

Not Used

G

TAN

28

Horn Relay Control

H

WHT

111

Hazard Switch Signal

Turn Signal/Multifunction Switch - C2


Object Number: 130718 Size: CH

Connector Part Information
    • 12059800
    • 5-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

307

Headlamp Switch Flash to Pass Signal

B

LT GRN

11

Headlamp Dimmer Switch Signal

C-D

--

--

Not Used

E

BLK

350

Ground

Turn Signal/Multifunction Switch - C3


Object Number: 811190 Size: CH

Connector Part Information
    • 15339058
    • 7-Way F Metri-Pack/150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

G

--

--

Not Used

H

PNK

94

Windshield Washer Switch Signal

J

GRY

478

Windshield Wiper Switch Signal 2

K

DK BLU

477

Windshield Wiper Switch Signal 1

L-N

--

--

Not Used

Turn Signal/Multifunction Switch - C4 (K34)


Object Number: 39661 Size: CH

Connector Part Information
    • 12047786
    • 4-Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

739

Ignition 1 Voltage

B

GRY

397

Cruise Control On Switch Signal

C

GRY/BLK

87

Cruise Control Resume/Accel Switch Signal

D

DK BLU

84

Cruise Control Set/Coast Switch Signal

Underhood Lamp


Object Number: 537107 Size: CH

Connector Part Information
    • 12052644
    • 2-Way F Metri-Pack 150 Series- Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

1732

Inadvertent Power Supply Voltage

B

BLK

1250

Ground

Vanity Mirror Lamp - Left (DH6)


Object Number: 35441 Size: CH

Connector Part Information
    • 12047663
    • 2-Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1732

Inadvertent Power Supply Voltage

B

BLK

450

Ground

Vanity Mirror Lamp - Right (DH6)


Object Number: 35441 Size: CH

Connector Part Information
    • 12047663
    • 2-Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1732

Inadvertent Power Supply Voltage

B

BLK

450

Ground