GM Service Manual Online
For 1990-2009 cars only

Range

Park

Reverse

Neutral

D4

D3

D2

D1

Gear

N

R

N

1st

2nd

3rd

4th

1st

2nd

3rd

1st

2nd

1st

2nd

1-2 Shift Solenoid

ON

ON

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

OFF

ON

OFF

2-3 Shift Solenoid

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

ON

OFF

OFF

OFF

OFF

Forward

--

--

--

A

A

A

A

A

A

A

A

A

A

A

Coast

--

--

--

--

--

--

--

--

--

A

A

A

A

A

3rd Clutch

--

--

--

--

--

A

A

--

--

A

--

--

--

--

2nd Clutch

--

--

--

--

A

A

A

--

A

A

--

A

--

A

Reverse

--

A

--

--

--

--

--

--

--

--

--

--

--

--

4th Band

--

--

--

--

--

--

A

--

--

--

--

A

--

A

Lo/Rev

Band

A

A

A

A

--

--

--

A

--

--

A

--

A

--

Lo Roller

--

--

--

H

--

--

--

H

--

--

H

--

H

--

2nd Sprag

--

--

--

--

H

--

--

--

H

--

--

H

--

H

Forward

Sprag

--

--

--

H

H

H

--

H

H

H

H

H

H

H

  • A = Applied
  • H = Holding
  • ON = The solenoid is energized.
  • OFF = The solenoid is de-energized