GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine side
Table 2: Transmission side

Automatic Transmission Wiring Harness Assembly 20-way Connector

Engine side


Object Number: 529775  Size: CH

Connector Part Information

    • 12160493
    • 20-way F Micro-Pack 100W Series (Gray)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1222

1-2 Shift Solenoid Valve Control

B

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

C

RED/BLK

1228

Pressure Control (PC) Solenoid Valve Controlled Power Feed

D

LT BLU/WHT

1229

PC Solenoid Valve Controlled Ground

E

PNK

439

Transmission Solenoid Power

F-K

--

--

Not Used

L

YEL/BLK

1227

Transmission Fluid Temperature (TFT) Sensor Signal

M

BLK

407

TFT Sensor Ground

N

PNK

1224

Transmission Fluid Pressure (TFP) Manual Valve Position Switch Signal A

P

RED

1226

TFP Manual Valve Position Switch Signal C

R

DK BLU

1225

TFP Manual Valve Position Switch Signal B

S

RED/BLK

1230

Automatic Transmission Input (Shaft) Speed Sensor (AT ISS) HIGH

T

BRN

418

Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control

U

YEL

657

TCC Release Switch Signal

V

DK BLU/WHT

1231

AT ISS LOW

W

--

--

Not Used

Automatic Transmission Wiring Harness Assembly 20-way Connector

Transmission side


Object Number: 537496  Size: CH

Connector Part Information

    • 12160782
    • 20-way M Micro-Pack 100W Series (Gray)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1222

1-2 Shift Solenoid Valve Control

B

YEL

1223

2-3 Shift Solenoid Valve Control

C

PPL

1228

Pressure Control (PC) Solenoid Valve Controlled Power Feed

D

LT BLU

1229

PC Solenoid Valve Controlled Ground

E

RED

839

Transmission Solenoid Power

L

DK BRN

1227

Transmission Fluid Temperature (TFT) Sensor Signal

M

GRY

452

TFT Sensor Ground

N

PNK

1224

Transmission Fluid Pressure (TFP) Manual Valve Position Switch Signal A

P

RED

1226

TFP Manual Valve Position Switch Signal C

R

DK BLU

1225

TFP Manual Valve Position Switch Signal B

S

BLK

1230

Automatic Transmission Input (Shaft) Speed (AT ISS) HIGH

T

TAN

418

Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control

U

WHT

1804

TCC Release Switch Signal

V

GRN

1231

AT ISS LOW