GM Service Manual Online
For 1990-2009 cars only
Table 1: Transmission Range Switch Logic (2.2L)
Table 2: Transmission Range Switch Logic (2.4L Hybrid)

Transmission Range Switch Logic (2.2L)

Gear Selector Position

Signal P

Signal A

Signal B

Signal C

Park (P)

On

On

Off

Off

Reverse (R)

Off

On

On

Off

Neutral (N)

On

Off

On

Off

Drive (D)

Off

Off

On

On

Intermediate (I)

On

On

On

On

Low (L)

Off

On

Off

On

On = Ignition voltage

Off = 0 volts

Transmission Range Switch Logic (2.4L Hybrid)

Gear Selector Position

Signal A

Signal B

Signal C

Signal P

Park (P)

LOW

HI

HI

LOW

Reverse (R)

LOW

LOW

HI

HI

Neutral (N)

HI

LOW

HI

LOW

Drive (D)

HI

LOW

LOW

HI

Intermediate (I)

LOW

LOW

LOW

LOW

Low (L)

LOW

HI

LOW

HI

HI = Ignition voltage

LOW = 0 volts