GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Automatic Transmission Related Connector End Views
Table 1: Automatic Transmission Input Shaft Speed (ISS) Sensor Connector (LG5/MX4/MTW)
Table 2: Automatic Transmission Modulator Connector (MF1)
Table 3: Automatic Transmission Shift Lever Connector
Table 4: Neutral Safety Switch Connector (MF1)
Table 5: Park/Neutral Relay (LG5/MX4/MTW)
Table 6: Park/Neutral Position (PNP) Switch (C1) Connector (LG5/MX4/MTW)
Table 7: Park/Neutral Position (PNP) Switch (C1) Connector (L18/MX4/MTW)
Table 8: Park/Neutral Position (PNP) Switch (C2) Connector (C2)
Table 9: Stoplamp Switch Signal Inverter Module Connector (LG5/JE3/MX4/MTW)
Table 10: Transmission Control Module (TCM) (C1) Connector (MX4/MTW)
Table 11: Transmission Control Module (TCM) (C2) Connector (C2) (MX4/MTW)
Table 12: Turbine Shaft Speed (TSS) Sensor Connector (MX4/MTW)

Automatic Transmission Input Shaft Speed (ISS) Sensor Connector (LG5/MX4/MTW)


Object Number: 237066 Size: CH

Connector Part Information
    • 12162193
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

RED/BLK

1230

AT ISS High Signal

B

DK BLU/WHT

1231

AT ISS Low Signal

Automatic Transmission Modulator Connector (MF1)


Object Number: 68721 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

BRN

323

Shift Solenoid Feed

B

BLK

150

Ground

Automatic Transmission Shift Lever Connector


Object Number: 62463 Size: CH

Connector Part Information
    • 12064766
    • 8-Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Supply Voltage - 1

B

GRY

1148

Transmission Shift Inhibit Signal (MX4/MTW)

B

--

--

Not Used (w/o MX4/MTW)

C-E

--

--

Not Used

F

39

Ignition 1 Voltage (MX4/MTW)

F

--

--

Not Used (w/o MX4/MTW)

G

--

--

Not Used

H

BLK

150

Ground

Neutral Safety Switch Connector (MF1)


Object Number: 38554 Size: CH

Connector Part Information
    • 12124819 Connector Assembly
    • 2-Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

806

Crank Voltage

B

ORN/BLK

434

Neutral Safety Switch Signal

Park/Neutral Relay (LG5/MX4/MTW)


Object Number: 535912 Size: CH

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

Pin

Wire Color

Circuit No.

Function

30

ORN/BLK

1786

Transmission Park/Neutral Signal

85

PNK

639

Ignition 1 Voltage

86

PPL

1452

Vehicle Interface Module Relay Feed-Coil-#2

87

PNK

639

Ignition 1 Voltage

Park/Neutral Position (PNP) Switch (C1) Connector (LG5/MX4/MTW)


Object Number: 535900 Size: CH

Connector Part Information
    • 12129840
    • 7-Way F Metri-Pack 150/280 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used-Plugged

C

BRN

41

Ignition 3 Voltage

D

BLK/WHT

451

Ground

E

--

--

Not Used-Plugged

F

LT GRN

24

Backup Lamp Supply Voltage

G

--

--

Not Used-Plugged

Park/Neutral Position (PNP) Switch (C1) Connector (L18/MX4/MTW)


Object Number: 535900 Size: CH

Connector Part Information
    • 12129840
    • 7-Way F Metri-Pack 150/280 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used-Plugged

C

BRN

41

Ignition 3 Voltage

D

BLK

2762

Low Reference

E

PPL

806

Crank Voltage

F

LT GRN

24

Backup Lamp Supply Voltage

G

ORN/BLK

434

Neutral Safety Switch Signal

Park/Neutral Position (PNP) Switch (C2) Connector (C2)


Object Number: 535904 Size: CH

Connector Part Information
    • 12191757
    • 4-Way F Metri-Pack 150 Series, Sealed (NAT)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

771

Transmission Range Switch Signal A

B

GRY

773

Transmission Range Switch Signal C

C

WHT

776

Transmission Range Switch Signal P

D

YEL

772

Transmission Range Switch Signal B

Stoplamp Switch Signal Inverter Module Connector (LG5/JE3/MX4/MTW)


Object Number: 237093 Size: CH

Connector Part Information
    • 12015410
    • 6-Way P/C Edgeboard Series-Standard (GRN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

20

Stop Lamp Supply Voltage

C

--

--

Not Used

D

BLK/WHT

451

Ground

E

ORN

903

Inverted Stop Lamp Switch Signal

F

--

--

Not Used

Transmission Control Module (TCM) (C1) Connector (MX4/MTW)


Object Number: 39787 Size: CH

Connector Part Information
    • 12129025 Connector
    • 32-Way F Micro-Pack 100W Series, Sealed (NAT)
    • 12129022 Retainer
    • (CLR)

Pin

Wire Color

Circuit No.

Function

1

BLK

451

Ground

2

PNK

639

Ignition 1 Voltage

3

ORN

1040

Battery Positive Voltage (L18)

3

ORN

840

Battery Positive Voltage (LG5)

4

PNK

639

Ignition 1 Voltage

5

BLK/WHT

451

Ground

6

--

--

Not Used-Plugged

7

PPL

420

TCC Brake Switch Signal (L18)

7

PPL

1146

Engine Brake Enable Signal (LG5)

8

--

--

Not Used-Plugged

9

WHT

2467

Inverted Stop Lamp Switch Signal (L18)

9

--

--

Not Used-Plugged

10

YEL

1481

Transmission Auxiliary Hold Signal

11

TAN

1147

Transmission Shift Inhibit Signal

12

--

--

Not Used-Plugged

13

PNK

1905

Retarder Disable Control

14

--

--

Not Used-Plugged (L18)

14

ORN

903

Inverted Stop Lamp Switch Signal (LG5)

15

--

--

Not Used-Plugged

16

TAN/BLK

464

Delivered Torque Signal (L18)

16

--

--

Not Used-Plugged (LG5)

17-19

--

--

Not Used-Plugged

20

--

--

Not Used-Plugged (L18)

20

DK GRN

901

Engine Brake Relay Control (LG5)

21

PPL

898

Shift Solenoid C Output (L18)

21

PPL

1452

Vehicle Interface Module Relay - Coil - Feed - 2 (LG5)

22

ONR/BLK

463

Requested Torque Signal (L18)

22

--

--

Not Used-Plugged (LG5)

23

GRY

1148

Transmission Shift Inhibit Signal

24

--

--

Not Used-Plugged

25

BRN/WHT

1034

Do Not Shift Indicator Control (L18)

25

GRY

1234

Service Transmission Indicator Control (LG5)

26

--

--

Not Used-Plugged

27

YEL

400

Signal High - Front (L18)

27

BRN

437

Vehicle Speed Signal (LG5)

28

--

--

Not Used-Plugged

29

--

--

Not Used-Plugged (L18)

29

YEL

2361

SAE J1939 Serial Data A (LG5)

30

DK GRN

1049

PCM Class 2 Serial Data

31

--

--

Not Used-Plugged (L18)

31

BLK/WHT

2363

SAE J1939 Serial Data Shield (LG5)

32

--

--

Not Used-Plugged (L18)

32

DK GRN

2362

SAE J1939 Serial Data B (LG5)

Transmission Control Module (TCM) (C2) Connector (C2) (MX4/MTW)


Object Number: 39787 Size: CH

Connector Part Information
    • 12129025 Connector
    • 32-Way F Micro-Pack 100W Series, Sealed (NAT)
    • 12129024 Retainer
    • (RED)

Pin

Wire Color

Circuit No.

Function

1

PNK

1224

Transmission Fluid Pressure Switch Signal A

2

DK BLU

1225

Transmission Fluid Pressure Switch Signal B

3

RED

1226

Transmission Fluid Pressure Switch Signal C

4

LT GRN/BLK

918

Transmission Fluid Pressure Switch Signal R

5

BLK/WHT

771

Transmission Range Switch Signal A

6

YEL

772

Transmission Range Switch Signal B

7

GRY

773

Transmission Range Switch Signal C

8

WHT

776

Transmission Range Switch Signal P

9

--

--

Not Used-Plugged

10

YEL/BLK

1227

TFT Sensor Signal

11-12

--

--

Not Used-Plugged

13

ORN

1983

Transmission Tubine Speed Switch Signal

14

LT BLU

1984

Transmission Tubine Speed Switch Low Reference

15

PPL/WHT

821

VSS High Signal

16

LT GRN/BLK

822

VSS Low Signal

17

RED/BLK

1230

AT ISS High Signal

18

DK BLU/WHT

1231

AT ISS Low Signal

19

--

--

Not Used-Plugged

20

BLK

2762

Low Reference

21

PPL

930

Low Reference

22

LT BLU/WHT

1229

PC Solenoid Valve Low Control (Sol. A)

23

RED/BLK

1228

PC Solenoid Valve High Control (Sol. A)

24

PNK/BLK

904

PC Solenoid Valve High Control (Sol. B)

25

BRN/WHT

908

PC Solenoid Valve Low Control (Sol. B)

26

LT GRN

1222

-Shift Solenoid A Valve Control

27

YEL/BLK

1223

Shift Solenoid B Valve Control

28

ORN/BLK

910

Shift Solenoid E Valve Control

29

BRN

418

TCC PWM Solenoid Valve Control

30-32

--

--

Not Used-Plugged

Turbine Shaft Speed (TSS) Sensor Connector (MX4/MTW)


Object Number: 655692 Size: CH

Connector Part Information
    • 12162193
    • 2-Way F Metri-Pack 150.2 Series, Pull to Seat, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1983

Transmission Turbine Speed Switch Signal

B

LT BLU

1984

Transmission Turbine Speed Switch Low Reference