GM Service Manual Online
For 1990-2009 cars only

Shift Solenoid Valve State and Gear Ratio

Gear Range

Reverse, 1st Shift Solenoid Valve (S1)

2-3, 3-4 Shift Solenoid Valve (S2)

1-2, 2-3 Shift Solenoid Valve (S3)

3-4, 4-5 Shift Solenoid Valve (S4)

Reverse Shift Solenoid Valve (S5)

Gear Ratio

Park, Neutral

OFF

OFF

OFF

OFF

OFF

--

Reverse

OFF

ON

ON

OFF

ON

5.024

First (M)

ON

OFF

ON

OFF

ON

4.575

First (D), (M)

ON

OFF

ON

OFF

OFF

4.575

Second

OFF

ON

ON

OFF

OFF

2.979

Third

OFF

ON

ON

ON

OFF

1.947

Fourth

OFF

ON

OFF

ON

OFF

1.318

Fifth

OFF

OFF

OFF

ON

OFF

1.000

The reverse, 1st; 2-3, 3-4; and 3-4, 4-5 shift solenoid valves are normally-open.

The 1-2, 2-3, reverse; and reverse shift solenoid valves are normally-closed.

The reverse shift solenoid valve is also energized (ON) during 2-3 and 3-4 shifts.