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

3.177:1

First (L2)

ON

OFF

ON

OFF

ON

4.685:1

First (D), (L4)

ON

OFF

ON

OFF

OFF

4.685:1

Second

OFF

ON

ON

OFF

OFF

2.942:1

Third

OFF

ON

ON

ON

OFF

1.923:1

Fourth

OFF

ON

OFF

ON

OFF

1.301:1

Fifth

OFF

OFF

OFF

ON

OFF

1.000:1

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.