GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Transmission Fluid Temperature (TFT) Sensor
Table 2: Automatic Transmission Input Shaft Speed (AT ISS) Sensor
Table 3: Automatic Transmission Output Shaft Speed (AT OSS) Sensor
Table 4: Automatic Transmission (LCT)
Table 5: Automatic Transmission (MD)
Table 6: Automatic Transmission Shift Selector (MD)
Table 7: Overdrive Defeat Switch (LCT)
Table 8: Park/Neutral Position (PNP) Switch-C1 (LCT) (LB7/LG4)
Table 9: Park/Neutral Position (PNP) Switch-C2 (LCT) (LB7/LG4/LLY)
Table 10: Park/Neutral Position (PNP) Switch (LCT) (L18/LG5/LLY)
Table 11: Transmission Control Module (TCM)-C1 (LCT)
Table 12: Transmission Control Module (TCM)-C2 (LCT)
Table 13: Transmission Control Module (TCM)-C1 (MD)
Table 14: Transmission Control Module (TCM)-C2 (MD)
Table 15: Transmission Control Module (TCM)-C3 (MD)
Table 16: Turbine Shaft Speed (TSS) Sensor

Automatic Transmission Fluid Temperature (TFT) Sensor


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

Automatic Transmission Input Shaft Speed (AT ISS) Sensor


Object Number: 666646  Size: CH

Connector Part Information

    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

RD/BK

1230

AT ISS High Signal

2

D-BU/WH

1231

AT ISS Low Signal

Automatic Transmission Output Shaft Speed (AT OSS) Sensor


Object Number: 666646  Size: CH

Connector Part Information

    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

PU/WH

821

VSS High Signal

2

L-GN/BK

822

VSS Low Signal

Automatic Transmission (LCT)


Object Number: 655729  Size: CH

Connector Part Information

    • 12186609
    • 20-Way F Micro-Pack 100W (GY)

Pin

Wire Color

Circuit No.

Function

A

PU

898

Shift Solenoid C Control

B

YE/BK

2879

Shift Solenoid D Control

C

BN

323

12-Volt Reference

D

PK

1224

Transmission Fluid Pressure Switch Signal A

E

RD

1226

Transmission Fluid Pressure Switch Signal C

F

D-BU

1225

Transmission Fluid Pressure Switch Signal B

G

YE/BK

1227

TFT Sensor Signal

H

BK

2762

Low Reference

J

WH

1994

Shift Solenoid G Control

K

L-GN/BLK

2529

Pressure Switch Manifold Reverse

L

RD/BK

1228

PC Solenoid Valve High Control (Sol. A)

M

L-BU/WH

1229

PC Solenoid Valve Low Control (Sol. A)

N

PK/BK

2468

PC Solenoid Valve High Control (Sol. B)

P

BN/WH

2469

PC Solenoid Valve Low Control (Sol. B)

R

D-BU

1530

Transmission Mainline Pressure Solenoid Control

S

D-GN /WH

2528

PC Solenoid Valve Low Control Solenoid G

T

PU

2471

Trans I.D.

U-V

--

--

Not Used

W

OG/WH

2527

Shift Soleniod C Valve Control

Automatic Transmission (MD)


Object Number: 216248  Size: CH

Connector Part Information

    • 29511365
    • 31-Way F Non-Inline (GY)

Pin

Wire Color

Circuit No.

Function

1

RD

1525

12-Volt Reference

2

PU

898

Shift Solenoid C Valve Control

3

WH

2880

Shift Solenoid G Valve Contro

4

D-GN

1313

Oil Temperature Sensor Signal

5

D-GN

1531

12-Volt Reference

6

WH

1994

Shift Solenoid D Valve Control

7

OG

1991

Shift Solenoid A Valve Control

8

WH

1526

12-Volt Reference

9

PU

1992

Shift Solenoid B Valve Control

10

OG/WH

2527

Shift Solenoid C Valve Control

11

L-GN

1527

12-Volt Reference

12

YE/BK

2879

Shift Solenoid D Valve Control

13

BK

407

Low Reference

14

YE/BK

1227

TFT Sensor Signal

15-18

--

-

Not Used

19

L-BU

1984

Transmission Turbine Speed Switch Low Reference

20

OG

1983

Transmission Turbine Speed Switch Signal

21

PU

2471

Trans I.D.

22

RD

1226

Transmission Fluid Pressure Switch Signal C

23

WH

1971

Transmission Oil Level Sensor Signal

24-31

--

--

Not Used

Automatic Transmission Shift Selector (MD)


Object Number: 1391747  Size: CH

Connector Part Information

    •  15383243
    • 14-Way GT Mixed With Latch (BK)

Pin

Wire Color

Circuit No.

Function

1

OG

1940

Battery Positive Voltage

2

L-BU

553

Tow/Haul Switch Signal

3

GY

598

5 Volt Reference

4

BK/WH

351

Ground

5

GY

8

Crank Voltage

6

--

--

Not Used

7

D-BU

1378

Transmission Shift Selector Display Signal

8

BK

450

Ground

9

D-GN

1373

Transmission Shift Selector Mode Signal

10

BK/WH

771

Transmission Range Switch Signal A

11

YE

772

Transmission Range Switch Signal B

12

L-GN

1371

Shift Data Bit 4

13

TN

2654

Shift Data Bit 8

14

WH

776

Transmission Range Switch Signal P

Overdrive Defeat Switch (LCT)


Object Number: 40422  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

BK

750

Ground

B

BK

750

Ground

C

TN/WH

2678

Overdrive Defeat Switch Signal

D

PK

239

Ignition 1 Voltage

E

BN

2509

Left Rear Park Lamps Supply Voltage/Left Rear Park Lamps

F

TN/WH

2678

Overdrive Defeat Signal

Park/Neutral Position (PNP) Switch-C1 (LCT) (LB7/LG4)


Object Number: 655808  Size: CH

Connector Part Information

    • 15324591
    • 4-Way F Metri-Pack 150 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

BK/WH

771

Transmission Range Switch Signal A

B

GY

773

Transmission Range Switch Signal C

C

WH

776

Transmission Range Switch Signal P

D

YE

772

Transmission Range Switch Signal B

Park/Neutral Position (PNP) Switch-C2 (LCT) (LB7/LG4/LLY)


Object Number: 535900  Size: CH

Connector Part Information

    •  12129840
    • 7-Way F Metri Pak 150,280 (GY)

Pin

Wire Color

Circuit No.

Function

A

OG/BK

1786

Park Neutral Signal

B

--

--

Not Used

C

PK

139

Ignition 1 Voltage

D

BK/WH

251

Ground

E

PU

806

Crank Voltage

F

L-GN

24

Backup Lamp Supply Voltage

G

D-GN

1433

Clutch Start Switch Signal

Park/Neutral Position (PNP) Switch (LCT) (L18/LG5/LLY)


Object Number: 901402  Size: CH

Connector Part Information

    •  15411266
    • 12-Way GT Mixed With Latch (GY)

Pin

Wire Color

Circuit No.

Function

1

D-GN

1433

PNP/Clutch Start Switch Signal

2-3

--

--

Not Used

4

YE

772

Transmission Range Switch Signal B

5

BK/WH

771

Transmission Range Switch Signal A

6

GY

773

Transmission Range Switch Signal C

7

BK/WH

251

Ground

8

WH

776

Clutch Start Switch Signal

9

--

--

Transmission Range Switch Signal P

10

L-GN

24

Backup Lamp Supply Voltage

11

PK

139

Ignition 1 Voltage

12

PU

806

Crank Voltage

Transmission Control Module (TCM)-C1 (LCT)


Object Number: 698666  Size: CH

Connector Part Information

    • 15305371
    • 32-Way F Micro-Pack 100 W (GY)

Pin

Wire Color

Circuit No.

Function

1

BK/WH

351

Ground

BK/WH

451

Ground (w/LLY)

2

PK

1020

Off/Run/Crank Voltage (w/L18,LG4,LB7,LG5)

3

OG

440

Battery Positive Voltage

4

PK

1020

Ignition 0 Voltage

5

BK/WH

351

Ground

BK/WH

51

Ground (w/LLY)

6

YE

2522

PTO Engaged Signal

7

PU

420

TCC Brake Switch/Cruise Control Release Signal (w/LLY)

8

YE

1479

A/T Neutral Signal (w/L18,LG4,LG5,LB7)

9

WH

2467

Unmanaged Torque (w/L18)

--

--

Not Used (w/LLY)

10

TN/WH

2678

Overdrive Defeat Switch Signall (w/L18,LG4,LG5,LB7)

11

TN

1147

Transmission Shift Inhibit Signal l (w/L18,LG4,LG5,LB7)

12-15

--

--

Not Used

16

TN/BK

464

Delivered Torque Signal (w/L18)

17-18

--

--

Not Used

19

L-BU

1480

Transmission Power Take-Off Enable Signal l (w/L18,LG4,LG5,LB7)

20

--

--

Not Used

21

PU

1146

Engine Brake Enable Signal l (w/L18,LG4,LG5,LB7)

22

OG/BK

463

Requested Torque Signal (w/L18)

23-24

--

--

Not Used

25

GY

1234

Do Not Shift Indicator Control

GY

2466

Do Not Shift Control (w/LLY)

26

--

--

Not Used

27

L-BU

2221

Signal High - Rear

YE

400

Signal High - Front/VSS High Signal/OSS High Signal

--

--

Not Used (L18)

28

BK

407

Low Reference (w/L18,LG4,LG5,LB7)

29

YE

2361

CAN Serial Data High

30

YE

2470

Class 2 Serial Data

31

--

--

Not Used

32

D-GN

2362

CAN Serial Data Low

Transmission Control Module (TCM)-C2 (LCT)


Object Number: 698666  Size: CH

Connector Part Information

    • 15305371
    • 32-Way F Micro-Pack 100 W (RD)

Pin

Wire Color

Circuit No.

Function

1

PK

1224

Transmission Fluid Pressure Switch Signal A

2

D-BU

1225

Transmission Fluid Pressure Switch Signal B

3

RD

1226

Transmission Fluid Pressure Switch Signal C

4

L-GN/BK

2529

Backup Lamp Supply Voltage/Backup Lamp Relay Control

5

BK/WH

771

Transmission Range Switch Signal A

6

YE

772

Transmission Range Switch Signal B

7

GY

773

Transmission Range Switch Signal C

8

WH

776

Transmission Range Switch Signal P

9

--

--

Not Used

10

YE/BK

1227

TFT Sensor Signal

11-12

--

--

Not Used

13

OG

1983

Transmission Turbine Speed Switch Signal

14

L-BU

1984

Transmission Turbine Speed Switch Low Reference

15

PU/WH

821

VSS High Signal

16

L-GN/BK

822

VSS Low Signal

17

RD/BK

1230

AT ISS High Signal

18

D-BU/WH

1231

AT ISS Low Signal

19

GY

1148

Transmission Shift Inhibit Signal

--

--

Not Used (L18)

20

BK

2762

Low Reference

21

PU

2471

Trans I.D.

22

RD/BK

1228

PC Solenoid Valve High Control (Sol. A)

L-BU/WH

1229

PC Solenoid Valve Low Control (Sol. A) (w/LLY)

23

RD/BK

1228

PC Solenoid Valve High Control (Sol. A) (w/LLY)

L-BU/WH

1229

PC Solenoid Valve Low Control (Sol. A)

24

PK/BK

2468

PC Solenoid Valve High Control (Sol. B)

25

BN/WH

2469

PC Solenoid Valve Low Control (Sol. B)

26

PU

898

Shift Solenoid A

L-GN

1222

Shift Soleniod A (w/LLY)

27

YE/BK

2879

Shift Solenoid D Control

YE/BK

1223

Shift Solenoid B (w/LLY)

28

OG/WH

2527

Shift Soleniod C Valve Control

29

WH

1994

Shift Soleniod C Valve Control

BN

418

TCC PWM Solenoid Valve Control (w/LLY)

30

D-BU

1530

Transmission Mainline Pressure Solenoid Control (w/LLY)

31

BRN

323

12-Volt Reference

32

D-GN/WH

2528

Main Pressure Modulation

Transmission Control Module (TCM)-C1 (MD)


Object Number: 698666  Size: CH

Connector Part Information

    • 15305371
    • 32-Way F Micro-Pack 100 W (GY)

Pin

Wire Color

Circuit No.

Function

1

TN/BK

1921

SAE J1587 Serial Data Bus+ Primary

2

--

--

Not Used

3

GY

598

5 Volt Reference

4

YE

2655

Ignition Sensor Signal

5

BK/WH

771

Transmission Range Switch Signal A

6

YE

772

Transmission Range Switch Signal B

7

L-GN

1371

Transmission Switch Signal

8

TN

2654

A/T Neutral Signal

9

WH

776

Transmission Range Switch Signal P

10

D-GN

1373

Transmission Shift Selector Mode Signal

11-12

--

--

Not Used

13

YE

2361

CAN Serial Data High

14

D-BU

1378

Transmission Shift Selector Display Signal

15

--

--

Not Used

16

RD/WH

1940

Battery Positive Voltage

17

WH/BK

1922

SAE J1708 Serial Data B

18-28

--

--

Not Ued

29

D-GN

2362

SAE J1939 Serial Data Bus-

30

--

--

Not Used

31

GY

1234

Do Not Shift Indicator Control

32

L-BU

553

Tow/Haul Switch Signal

Transmission Control Module (TCM)-C2 (MD)


Object Number: 698666  Size: CH

Connector Part Information

    • 15305371
    • 32-Way F Micro-Pack 100 W (RD)

Pin

Wire Color

Circuit No.

Function

1

RD/WH

440

Battery Positive Voltage

2

PU

1146

Transmission Fluid Pressure Switch Signal B

3

--

--

Not Used

4

GY

1524

Backup Lamp Supply Voltage/Backup Lamp

5

--

--

Not Used

6

YE

1479

A/T Neutral Signal

7-10

--

--

Not Used

11

TN

1147

Transmission Shift Inhibit Signal

12

YE

1481

Transmission Auxiliary Hold Signal

13

YE

2522

PTO Engage Signal

L-BU

915

Right Front Turn Signal Lamp Supply Voltage

14-15

--

--

Not Used

16

RD/WH

440

Battery Positive Voltage

17

BK/WH

351

Ground

18

--

--

Not Used

19

GY

1148

Transmission Shift Inhibit Signal

20

L-BU

2221

Signal High - Rear

21

--

--

Not Used

22

L-BU

1480

Transmission Power Take-Off Enable Signal

23-25

--

--

Not Used

26

PK

1020

Ignition 0 Voltage

27-29

--

--

Not Used

30

YE

1479

A/T Neutral Signal

31

TN

476

Low Reference

32

BK/WH

351

Ground

Transmission Control Module (TCM)-C3 (MD)


Object Number: 698666  Size: CH

Connector Part Information

    • 15305371
    • 32-Way F Micro-Pack 100 W (NA)

Pin

Wire Color

Circuit No.

Function

1

RD/BK

1525

Clutch Pressure Control Solenoid Valve 1 High Control (w/MWX)

2

WH

1526

12-Volt Reference

3

D-GN

1531

12-Volt Reference

4

OG

1991

Shift Soleniod A Valve Control

5

PU

898

Shift Soleniod C Valve Control

6

OG/WH

2527

Shift Soleniod C Valve Control

7

WH

2880

Shift Soleniod G Valve Control

8

--

--

Not Used

9

D-GN

1313

Oil Temperature Sensor Signal

10-11

--

--

Not Used

12

RD

1226

Transmission Fluid Pressure Switch Signal C

13

PU

2471

Trans I.D.

14

RD/BK

1230

AT ISS High Signal

15

OG

1983

Transmission Turbine Speed Switch Signal

16

YE

400

Signal High - Front

17

L-GN

1527

12-Volt Reference

18-19

--

--

Not Used

20

PU

1992

Shift Soleniod B Valve Control

21

YE/BK

2879

Shift Soleniod D Valve Control

22

WH

1994

Shift Soleniod F Valve Control

23-24

--

--

Not Used

25

BK

407

Low Reference

26

WH

1971

Transmission Oil Level Sensor Signal

27

YE/BK

1227

TFT Sensor Signal

28-29

--

--

Not Used

30

D-BU/WH

1231

AT ISS Low Signal

31

L-BU

1984

Transmission Turbine Speed Switch Low Reference

32

PU

401

Signal Low - Front

Turbine Shaft Speed (TSS) Sensor


Object Number: 666646  Size: CH

Connector Part Information

    • 15336024
    • 2-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

OG

1983

Transmission Turbine Speed Switch Signal

2

L-BU

1984

Transmission Turbine Speed Switch Low Reference