GM Service Manual Online
For 1990-2009 cars only

Transmission Range Switch Logic

Gear Select

Signal Circuits

A

B

C

P

P

HI

LOW

LOW

HI

R

HI

HI

LOW

LOW

N

LOW

HI

LOW

HI

D

LOW

HI

HI

LOW

I

HI

HI

HI

HI

L

HI

LOW

HI

LOW

    • HI = Ignition voltage
    • LOW = 0 voltage