GM Service Manual Online
For 1990-2009 cars only

 

Park

Reverse

Neutral

D

L4

L2

Gear

 

 

 

1

2

3

4

5

E

1

2

3

1 E/B

2

Rev, 1st Shift Solenoid Valve (S1)

OFF

OFF*

OFF

ON

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

ON

OFF

2-3, 3-4 Shift Solenoid Valve (S2)

OFF

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

OFF

ON

ON

OFF

ON

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

OFF

ON*

OFF

ON

ON

ON

OFF

OFF

OFF

ON

ON

ON

ON

ON

3-4, 4-5 Shift Solenoid Valve (S4)

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

OFF

ON

OFF

OFF

Reverse Shift Solenoid Valve (S5)

OFF

ON*

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

1-2 Reverse Clutch (B5)

A

A

A

A

A

--

--

--

--

A

A

--

A

A

4-5 Clutch (C3)

--

--

--

--

--

--

A

A

A

--

--

--

--

--

3rd Gear Band (B4)

--

--

--

--

--

A

--

--

--

--

--

A

--

--

Direct Clutch (C2)

--

A

--

--

--

--

--

A

A

--

--

--

--

--

Forward Clutch (C1)

--

--

--

A

A

A

A

A

A

A

A

A

A

A

Low and Reverse Clutch (B3)

--

A

--

--

--

--

--

--

--

--

--

--

A

--

Low Clutch Sprag (F2)

--

--

--

H

--

--

--

--

--

H

--

--

H

--

Second Clutch Sprag (F1)

--

--

--

--

H

H

H

--

--

--

H

H

--

H

Second Coast Clutch (B1)

--

--

--

--

A

A

A

--

--

--

A

A

--

A

Second

Clutch (B2)

--

--

--

--

A

A

A

A

A

--

A

A

--

A

  • E = Emergency
  • E/B = Engine Braking
  • ON = the solenoid valve is energized.
  • OFF = the solenoid valve is de-energized.
  • A = Applied
  • H = Holding
  • * = If vehicle speed is greater than 7 km/h (4 mph), the TCM commands the shift solenoid valves to inhibit reverse.