GM Service Manual Online
For 1990-2009 cars only
Table 1: Shift Solenoid Valve State
Table 2: Gear Ratios

Shift Solenoid Valve State

Shift Status

Solenoid Valve 1

Solenoid Valve 2

Solenoid Valve 3

Park

OFF

ON

OFF

Neutral

OFF

ON

OFF

1st

ON

ON

ON

1st-2nd

ON

ON

ON

2nd

ON

ON

OFF

2nd-3rd

OFF

ON

OFF

3rd

OFF

ON

ON

3rd-4th

OFF

OFF

ON

4th

OFF

OFF

OFF

4th-5th

ON

OFF

OFF

5th

ON

OFF

ON

Gear Ratios

Gear

Ratio

1st

2.185

2nd

1.270

3rd

1.023

4th

0.729

5th

0.530

Reverse

1.888

Final

4.058