GM Service Manual Online
For 1990-2009 cars only

Pressure Switch and Solenoid Logic States

Range

C

D

E

REV

N

On

On

On

OFF

R

On

On

On

On

R*

OFF

On

On

On

4

OFF

OFF

On

OFF

3

On

OFF

On

OFF

2

On

OFF

OFF

OFF

1

OFF

OFF

OFF

OFF

OFF

On

OFF

OFF

*N04 and later at closed throttle