GM Service Manual Online
For 1990-2009 cars only

Solenoid and Clutch Chart 2001 Model Year

Range Status

Logic State

Clutch to Line

Trim Solenoids

Shift Solenoids

TCC Sol.

A

B

C

D

E

F

Steady State

R

--

De-energized; C3 Applied

Energized; C5 Applied

ON

ON

ON

OFF

Down Shift

R-N

--

De-energizing; C3 Trimming Off

Energizing; C5 Applied

ON

ON

ON

OFF

Up Shift

N-R

--

Energizing; C3 Trimming On

Energizing; C5 Applied

ON

ON

ON

OFF

Steady State

N

--

De-energized; C5 Applied

De-energized; -- Exhausted

ON

ON

ON

OFF

Up Shift

N-1

--

De-energizing; C5 Applied

Energizing; C1 Trimming On

ON

ON

ON

OFF

Down Shift

1-N

--

De-energizing; C5 Applied

Energizing; C1 Trimming Off

ON

ON

ON

OFF

Steady State

1

C1

De-energized; C5 Applied

De-energized; C4 Exhausted

OFF

ON

OFF

OFF

Up Shift

1-2

C1

Energizing; C5 Trimming Off

Energizing; C4 Trimming On

OFF

ON

OFF

OFF

Down Shift

2-1

C1

Energizing; C5 Trimming On

Energizing; C4 Trimming Off

OFF

ON

OFF

OFF

Steady State

2

C1

Energized; C3 Exhausted

Energized; C4 Applied

OFF

OFF

OFF

ON or OFF*

Up Shift

2-3

C1

De-energizing; C3 Trimming On

De-energizing; C4 Trimming Off

OFF

OFF

OFF

ON

Down Shift

3-2

C1

De-energizing; C3 Trimming Off

De-energizing; C4 Trimming On

OFF

OFF

OFF

ON

Steady State

3

C1

De-energized; C3 Applied

De-energized; C2 Exhausted

ON

OFF

OFF

ON

Up Shift

3-4

C1

Energizing; C3 Trimming Off

Energizing; C2 Trimming On

ON

OFF

OFF

ON

Down Shift

4-3

C1

Energizing; C3 Trimming On

Energizing; C2 Trimming Off

ON

OFF

OFF

ON

Steady State

4

C2

Energized; C3 Exhausted

Energized; C1 Applied

ON

OFF

ON

ON

Up Shift

4-5

C2

De-energizing; C3 Trimming On

De-energizing; C1 Trimming Off

ON

OFF

ON

ON

Down Shift

5-4

C2

De-energizing; C3 Trimming Off

De-energizing; C1 Trimming On

ON

OFF

ON

ON

Steady State

5

C2

De-energized; C3 Applied

Energized; No Clutch Applied

OFF

OFF

ON

ON

* Depending upon output speed