GM Service Manual Online
For 1990-2009 cars only

Component

Circuit Number

Wire Color*

Inline Connector Pin

Resistance at 20°C (68°F)

Resistance at 70°C (158°F)

Resistance to Ground - Transmission Case

1-2 Shift Solenoid Valve

1525

WH

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

1222

BK

14

2-3 Shift Solenoid Valve

1525

WH

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

1223

BU

9

4-5 Shift Solenoid Valve

1525

WH

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

898

GY

5

Pressure Control Solenoid Valve

1228

GN

13

3.5-4.6 ohms

4.2-5.5 ohms

Greater than 50Kohms

1229

WH

8

TCC PWM Solenoid Valve

1525

WH

17

10.0-11.5 ohms

11.8-13.6 ohms

Greater than 50Kohms

422

YE

20

Input Speed Sensor

1230

YE

18

325-485 ohms

385-575 ohms

Greater than 50Kohms

1231

WH

15

Output Speed Sensor

400

OR

1

325-485 ohms

385-575 ohms

Greater than 50Kohms

401

WH

3

TFT Sensor

1227

RD

10

Refer to Transmission Fluid Temperature Sensor Specifications .

2762

WH

6

* All wire colors are internal to the transmission.