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

WHT

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

1222

BLK

14

2-3 Shift Solenoid Valve

1525

WHT

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

1223

BLU

9

4-5 Shift Solenoid Valve

1525

WHT

17

15.0-17.0 ohms

17.9-20.3 ohms

Greater than 50Kohms

898

GRY

5

Pressure Control Solenoid Valve

1228

GRN

13

3.5-4.6 ohms

4.2-5.5 ohms

Greater than 50Kohms

1229

WHT

8

TCC PWM Solenoid Valve

1525

WHT

17

10.0-11.5 ohms

11.8-13.6 ohms

Greater than 50Kohms

422

YEL

20

Input Speed Sensor

1230

YEL

18

325-485 ohms

385-575 ohms

Greater than 50Kohms

1231

WHT

15

Output Speed Sensor

400

ORN

1

325-485 ohms

385-575 ohms

Greater than 50Kohms

401

WHT

3

TFT Sensor

1227

RED

10

Refer to Transmission Fluid Temperature Sensor Specifications .

2762

WHT

6

* All wire colors are internal to the transmission.