GM Service Manual Online
For 1990-2009 cars only

 

Park

Reverse

Neutral

D

3

2

1

Gear

 

 

 

1st

2nd

3rd

4th

1st

2nd

3rd

1st

2nd

1st

1-2 Shift Solenoid

ON

ON

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

OFF

ON

2-3 Shift Solenoid

ON

ON

ON

ON

ON

OFF

OFF

ON

ON

OFF

ON

ON

ON

Fourth Clutch

--

--

--

--

--

--

A

--

--

--

--

--

--

Reverse Band

--

A

--

--

--

--

--

--

--

--

--

--

--

Second Clutch

--

--

--

--

A

A

A

--

A

A

--

A

--

Third Clutch

--

--

--

--

--

A

A*

--

--

A

--

--

A

Third Sprag

--

--

--

--

--

H

O

--

--

H

--

--

H

Input Clutch

A*

A

A*

A

A*

--

--

A

A*

A

A

A*

A

Input Sprag

H*

H

H

H

O

--

--

H

O

H

H

O

H

2-1 Manual Band

--

--

--

--

--

--

--

--

--

--

A

A

A

1-2 Support Roller Clutch

--

--

--

H

H

O

O

H

H

O

H

H

H

Forward Band

--

--

--

A

A

A*

A*

A

A

A*

A

A

A

  • ON = the solenoid valve is energized.
  • OFF = the solenoid valve is de-energized.
  • A = Applied
  • H = Holding
  • O = Overrun
  • * = applied, or holding, with no load--not transmitting torque.