GM Service Manual Online
For 1990-2009 cars only

Shift Solenoid State and Gear Ratio

Gear

1-2 Shift Solenoid

2-3 Shift Solenoid

Gear Ratio

1st

ON

ON

2.921:1

2nd

OFF

ON

1.568:1

3rd

OFF

OFF

1.000:1

4th

ON

OFF

0.705:1

Reverse

ON

ON

2.385:1