GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Controls - 6.5L (L65) 🢒 Engine Controls Connector End Views
Table 1: Accelerator Pedal Position (APP) Sensor
Table 2: Automatic Transmission (A/T) Modulator
Table 3: Clutch Pedal Position (CPP) Switch
Table 4: Crankshaft Position (CKP) Sensor
Table 5: Data Link Connector (DLC)
Table 6: Engine Coolant Temperature (ECT) Sensor
Table 7: Engine Coolant Temperature (ECT) Gauge Sensor
Table 8: Engine Shutoff Solenoid
Table 9: Fuel Pump (FP) Switch and Engine Oil Pressure (EOP) Gauge Sensor
Table 10: Fuel Filter Heater
Table 11: Fuel Lift Pump
Table 12: Fuel Sender
Table 13: Fuel Solenoid Driver
Table 14: Glow Plug Relay Connector C3
Table 15: HIGH IDLE Switch
Table 16: Injection Timing Stepper (ITS) Motor
Table 17: Intake Air Temperature (IAT) Sensor
Table 18: Low Engine Coolant Level Indicator Switch
Table 19: Multifunction Alarm Module (MFAM)
Table 20: Optical Fuel/Temperature Sensor
Table 21: Powertrain Control Module (PCM) Connector C1
Table 22: Powertrain Control Module (PCM) Connector C2
Table 23: Powertrain Control Module (PCM) Connector C3
Table 24: Speedo Adapter
Table 25: Stoplamps Switch Connector C1
Table 26: Stoplamps Switch Connector C2
Table 27: Turbocharger (TC) Waste Gate Regulating Solenoid Valve
Table 28: Turbo Pressure Sensor
Table 29: Vehicle Speed Sensor (VSS) (Automatic Transmission)
Table 30: Vehicle Speed Sensor (VSS) (Manual Transmission)
Table 31: Water-In-Fuel (WIF) Sensor

Accelerator Pedal Position (APP) Sensor


Object Number: 280766 Size: CH

Connector Part Information
    • 12065425
    • 10 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

1271

Electronic Throttle -Pedal Position Return 1

B

PPL

1272

Electronic Throttle -Pedal Position Return 2

C

LT BLU

1162

Electronic Throttle -Pedal Position Signal 2

D

TAN

1274

Electronic Throttle -Pedal Position 5v Reference 2

E

YEL/BLK

1275

Electronic Throttle -Pedal Position 5v Reference 3

F

DK BLU

1161

Electronic Throttle -Pedal Position Signal 1

G

WHT/BLK

1164

Electronic Throttle -Pedal Position 5v Reference 1

H

--

--

Not Used

J

GRY

1273

Electronic Throttle -Pedal Position Return 3

K

DK GRN

1163

Electronic Throttle -Pedal Position Signal 3

Automatic Transmission (A/T) Modulator


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

RED/BLK

1228

Transmission Force Motor Feed

B

BLK

150

Ground

Clutch Pedal Position (CPP) Switch


Object Number: 280768 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

379

Cruise Control Clutch Pedal Switch Output

B

PNK

39

Fuse Output-Ignition

Crankshaft Position (CKP) Sensor


Object Number: 68730 Size: CH

Connector Part Information
    • 12110293
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

573

Crankshaft Position Sensor Signal

B

PPL

574

Crankshaft Position Sensor Return

C

GRY

416

Reference Voltage Feed-5Volt Reference

Data Link Connector (DLC)


Object Number: 68793 Size: CH

Connector Part Information
    • 12110250
    • 16 Way F Metri-Pack 150 Series

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PPL

1807

Serial Data Signal-Class B-10400 Baud-Primary

3

--

--

Not Used

4

BLK

150

Ground

5

BLK/WHT

451

Engine Control Module Ground

6-11

--

--

Not Used

12

TAN/WHT

799

Diagnostic Signal-ABS

13-15

--

--

Not Used

16

ORN

140

Fuse Output-Battery

Engine Coolant Temperature (ECT) Sensor


Object Number: 68719 Size: CH

Connector Part Information
    • 12162194
    • 2 Way F Metri-Pack 150.2 Series Pull To Seat, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

410

Coolant Temperature Sensor Return

B

BLK

470

Sensor Return

Engine Coolant Temperature (ECT) Gauge Sensor


Object Number: 333039 Size: CH

Connector Part Information
    • 12089499
    • 2 Way F, Metri-Pack 150 Series, Sealed (BLU)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

35

Coolant Temperature Indicator Lamp Output

B

--

--

Not Used

Engine Shutoff Solenoid


Object Number: 333039 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

259

Engine Shutoff Solenoid Output

B

PNK

339

Fuse Output-Ignition

Fuel Pump (FP) Switch and Engine Oil Pressure (EOP) Gauge Sensor


Object Number: 39663 Size: CH

Connector Part Information
    • 12065401
    • 3 Way F Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

31

Oil Pressure Indicator Lamp Output

B

--

--

Not Used-Sealed

C

GRY

120

Fuel Pump Motor Feed

D

ORN

440

Fuse Output Battery Type III Fuse

Fuel Filter Heater


Object Number: 35437 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

BRN

741

Fuse Output-Ignition

Fuel Lift Pump


Object Number: 258174 Size: CH

Connector Part Information
    • 12059473
    • 2 Way M Weather Pack (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

GRY

120

Fuel Pump Motor Feed

Fuel Sender


Object Number: 38608 Size: CH

Connector Part Information
    • 12162188
    • 4 Way F Metri-Pack 150.2 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B-C

--

--

Not Used

D

PPL

30

Fuel Gauge Sensor Signal

Fuel Solenoid Driver


Object Number: 62443 Size: CH

Connector Part Information
    • 12047950
    • 4 Way F 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

260

Fuel Solenoid Module Feed

B

BLK

491

Fuel Solenoid Return-Closure

C

PNK

339

Fuse Output-Ignition

D

RED

313

Fuel Solenoid Closure Signal

Glow Plug Relay Connector C3


Object Number: 62433 Size: CH

Connector Part Information
    • 12045636
    • 4 Way F Metri-Pack 280 Series (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

PNK

539

Fuse Output-ignition

B

YEL

505

Glow Plug Relay Feed-Coil

C

BLK

150

Ground

D

--

--

Not Used

HIGH IDLE Switch


Object Number: 62432 Size: CH

Connector Part Information
    • 12041429
    • 5 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

341

Fuse Output-Ignition

B

DK GRN

534

High Idle Switch Output

C

--

--

Not Used

D

DK GRN

534

High Idle Switch Output

E

BLK/WHT

451

Engine Control Module Ground

Injection Timing Stepper (ITS) Motor


Object Number: 38608 Size: CH

Connector Part Information
    • 12162189
    • 4 Way F 150.2 Series, Sealed P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

TAN/BLK

1030

Injection Timing Stepper Motor Feed-Coil A-Low

B

ORG/BLK

1032

Injection Timing Stepper Motor Feed-Coil B-Low

C

YEL/BLK

1033

Injection Timing Stepper Motor Feed-Coil B-High

D

RED/BLK

1031

Injection Timing Stepper Motor Feed-Coil A-High

Intake Air Temperature (IAT) Sensor


Object Number: 68719 Size: CH

Connector Part Information
    • 12162198
    • 2 Way FMetri-Pack 150.2 Series Pull To Seat (GRY)

Pin

Wire Color

Circuit No.

Function

A

TAN

472

Manifold Absolute Temperature Sensor Return

B

BLK

470

Sensor Return

Low Engine Coolant Level Indicator Switch


Object Number: 236598 Size: CH

Connector Part Information
    • 12052641
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1478

Low Coolant Sensor Signal

B

BLK

150

Ground

Multifunction Alarm Module (MFAM)


Object Number: 73152 Size: CH

Connector Part Information
    • 12084944
    • 16 Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A1

LT BLU/BLK

1928

Brake Booster Fluid Flow Switch Feed

A2

YEL

53

Fuse Output-Generator-Tachometer Pulse

A3

LT BLU

20

Stop Lamp Feed

A4

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal

A5

PNK

39

Fuse Output-Ignition

A6

TAN/WHT

33

Brake Warning Indicator Lamp Output

A7

--

--

Not Used

A8

BLK

150

Ground

B1

LT GRN

1478

Low Coolant Sensor Signal

B2

YEL/BLK

68

Low Coolant Level Indicator Lamp Output

B3

YEL/BLK

1471

Brake Warning Indicator Lamp Feed-Seconday

B4

GRY

847

Brake Pedal Switch Output-Extended Travel

B5

--

--

Not Used

B6

BRN

1675

Check Gauges Signal

B7

LT BLU

1377

Check Gauges Indicator Lamp Output

B8

ORN

1740

Fuse Output-Battery

Optical Fuel/Temperature Sensor


Object Number: 62449 Size: CH

Connector Part Information
    • 12052848
    • 6 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

474

Reference Voltage Feed-5 Volt Reference

B

BRN/WHT

633

Camshaft Position Sensor Signal

C

ORN

1799

Camshaft Position Sensor Signal-High Resolution

D

PNK/BLK

632

Camshaft Position Sensor Return

E

YEL

1578

Fuel Temperature Signal

F

PNK/BLK

632

Camshaft Position Sensor Return (Jumpered to Pin D)

Powertrain Control Module (PCM) Connector C1


Object Number: 328562 Size: CH

Connector Part Information
    • 12160779
    • 32 Way F Micro-Pack 100 Series

Pin

Wire Color

Circuit No.

Function

C1

PPL

574

Crankshaft Position Sensor Return

C2-C3

--

--

Not Used

C4

TAN

472

Manifold Absolute Temperature Sensor Signal

C5

LT BLU

1162

Electronic Throttle-Pedal Position Signal 2

C6

YEL

505

Glow Plug Relay Feed-Coil

C7

--

--

Not Used

C8

YEL

1578

Fuel Temperature Signal

C9-C10

--

--

Not Used

C11

YEL

410

Coolant Temperature Sensor Signal

C12

--

--

Not Used

C13

RED

313

Fuel Solenoid Closure Signal

C14

LT GRN

432

Manifold Absolute Pressure Sensor Signal

C15-D2

--

--

Not Used

D3

YEL/BLK

1275

Electronic Throttle-Pedal Position 5v Ref 3

D4

DK GRN

1163

Electronic Throttle-Pedal Position Signal 3

D5

GRY

120

Fuel Pump Motor Feed

D6

GRY

1273

Electronic Throttle-Pedal Position Return

D7

DK BLU

507

Glow Plug Indicator Lamp Signal

D8

DK GRN/WHT

465

Fuel Pump Relay Feed-Coil

D9

PNK/BLK

632

Camshaft Position Sensor Return

D10

--

--

Not Used

D11

PPL/WHT

821

Vehicle Speed Sensor Signal

D12

WHT/BLK

1164

Electronic Throttle-Pedal Position 5v Ref 1

D13

GRY

416

Reference Voltage Feed-5 Volt Reference

D14

GRY

474

Reference Voltage Feed-5 Volt Reference

D15-D16

--

--

Not Used

Powertrain Control Module (PCM) Connector C2


Object Number: 73144 Size: CH

Connector Part Information
    • 12160778
    • 24 Way F Micro-Pack 100 Series (BRN)

Pin

Wire Color

Circuit No.

Function

A1

BLK

491

Fuel Solenoid Return-Closure

A2

ORN

1799

Camshaft Position Sensor Signal-High Resolution

A3

--

--

Not Used

A4

BRN/WHT

633

Camshaft Position Sensor Signal

A5

YEL

573

Camshaft Position Sensor Signal

A6

DK GRN/WHT

817

Vehicle Speed Signal-4000 Pulses Per Mile

A7

RED/BLK

1031

Injection Timing Stepper Motor Feed-Coil A-High

A8

TAN/BLK

1030

Injection Timing Stepper Motor Feed-Coil A-Low

A9

YEL/BLK

1033

Injection Timing Stepper Motor Feed-Coil B-High

A10

ORN/BLK

1032

Injection Timing Stepper Motor Feed-Coil B-Low

A11

BRN

741

Fuse Output-Ignition

A12

PPL

1272

Electronic Throttle-Pedal Position Return 2

B1

BRN

1271

Electronic Throttle-Pedal Position Return 1

B2

DK BLU

1161

Electronic Throttle-Pedal Position Signal 1

B3-B5

--

--

Not Used

B6

ORN/BLK

1786

Transmission Park/Neutral Signal

B7

DK GRN

534

High Idle Switch Output

B8

--

--

Not Used

B9

BRN/WHT

379

Cruise Control Clutch Pedal Switch Output

B10

LT BLU

20

Stop Lamp Feed

B11

--

--

Not Used

B12

BLK

452

Sensor Return

Powertrain Control Module (PCM) Connector C3


Object Number: 73157 Size: CH

Connector Part Information
    • 12110207
    • 32 Way F Micro-Pack 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

C1

--

--

Not Used

C2

TAN

1274

Electronic Throttle-Pedal Position 5V Ref 2

C3

LT GRN

260

Fuel Solenoid Module Feed

C4

BRN

1675

Check Gauges Signal

C5

LT GRN

36

Coolant Temperature Signal

C6-C7

--

--

Not Used

C8

PPL

1807

Serial Data Signal-Class B-10400 Baud-Primary

C9-C10

--

--

Not Used

C11

PNK

339

Fuse Output-Ignition

C12

PNK

339

Fuse Output-Ignition

C13

ORN

440

Fuse Output-Battery

C14

BRN/WHT

419

Check Engine Indicator Lamp Output

C15

DK BLU/WHT

259

Engine Shutoff Solenoid Output

C16

GRY

324

Shift Relay Output-Coil

D1-D2

--

--

Not Used

D3

LT GRN

260

Fuel Solenoid Module Feed

D4-D5

--

--

Not Used

D6

BLK/WHT

451

Engine Control Module Ground

D7

BLK/WHT

451

Engine Control Module Ground

D8-D10

--

--

Not Used

D11

WHT/BLK

176

Service Throttle Soon Indicator Lamp Output

D12

--

--

Not Used

D13

ORN

440

Fuse Output-Battery

D14

YEL

972

Wastegate Solenoid Output

D15

DK BLUE/WHT

259

Engine Shutoff Solenoid Output

D16

--

--

Not Used

Speedo Adapter


Object Number: 73152 Size: CH

Connector Part Information
    • 12084945
    • 16 Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A1

GRY/BLK

1467

Two Speed Rear Axle Shift Motor Relay Output-Coil

A2-A8

--

--

Not Used

B1

PNK

39

Fuse Output-Ignition

B2

PPL/WHT

821

Vehicle Speed Sensor Signal

B3

LT GRN/BLK

822

Vehicle Speed Sensor Return

B4

--

--

Not Used

B5

BLK/WHT

451

Engine Control Module Ground

B6-B7

--

--

Not Used

B8

DK GRN/WHT

817

Vehicle Speed Signal-4000 Pulses Per Mile

Stoplamps Switch Connector C1


Object Number: 130679 Size: CH

Connector Part Information
    • 12033704
    • 4 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

640

Fuse Output Battery Type III Fuse

B

LT BLU

20

Stop Lamp Feed

C

ORN

540

Fuse Output Battery Type III Fuse

D

GRY

847

Brake Pedal Switch Output Extended Travel

Stoplamps Switch Connector C2


Object Number: 333038 Size: CH

Connector Part Information
    • 12033709
    • 2 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

451

Engine Control Module Ground

B

TAN

848

Brake Pedal Switch Signal-ABS

Turbocharger (TC) Waste Gate Regulating Solenoid Valve


Object Number: 35437 Size: CH

Connector Part Information
    • 12052641
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

539

Fuse Output-Ignition

B

YEL

258

Waste Gate Solenoid Output

Turbo Pressure Sensor


Object Number: 280779 Size: CH

Connector Part Information
    • 12103771
    • 3 Way M Weather Pack TWR Series (WHT)

Pin

Wire Color

Circuit No.

Function

A

BLK

470

Sensor Return

B

LT GRN

432

Manifold Absolute Pressure Sensor Signal

C

GRY

416

Reference Voltage Feed-5 Volt Reference

Vehicle Speed Sensor (VSS) (Automatic Transmission)


Object Number: 35437 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

PPL/WHT

821

Vehicle Speed Sensor Signal

B

LT GRN

822

Vehicle Speed Sensor Return

Vehicle Speed Sensor (VSS) (Manual Transmission)


Object Number: 68719 Size: CH

Connector Part Information
    • 12162194
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL/WHT

821

Vehicle Speed Sensor Signal

B

LT GRN

822

Vehicle Speed Sensor Return

Water-In-Fuel (WIF) Sensor


Object Number: 68730 Size: CH

Connector Part Information
    • 12110293
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

741

Fuse Output-Ignition

B

YEL/BLK

508

Water In Fuel Indicator Lamp Output

C

BLK

150

Ground