GM Service Manual Online
For 1990-2009 cars only

Component

Circuit Number

Wire Color

In-Line Connector Pin

Resistance at 20°C

Resistance at 70°C

Resistance to Ground (Transmission Case)

1-2 Shift Solenoid Valve

1525

WH

17

15-17 Ω

17.9-20.3 Ω

Greater than 50k Ω

1222

BK

14

2-3 Shift Solenoid Valve

1525

WH

17

15-17 Ω

17.9-20.3 Ω

Greater than 50k Ω

1223

BU

9

4-5 Shift Solenoid Valve

1525

WH

17

15-17 Ω

17.9-20.3 Ω

Greater than 50k Ω

898

GY

5

Pressure Control Solenoid Valve

1228

GN

13

3.5-4.6 Ω

4.2-5.5 Ω

Greater than 50k Ω

1229

WH

8

TCC PWM Solenoid Valve

1525

WH

17

10-11.5 Ω

11.8-13.6 Ω

Greater than 50k Ω

422

YE

20

Input Speed Sensor

1230

YE

18

325-485 Ω

385-575 Ω

Greater than 50k Ω

1231

WH

15

Output Speed Sensor

400

OR

1

325-485 Ω

385-575 Ω

Greater than 50k Ω

401

WH

3

TFT Sensor

1227

RD

10

Refer to Transmission Fluid Temperature Sensor Specifications for TFT Sensor Resistance

2762

WH

6

All wire colors are internal to the transmission.