GM Service Manual Online
For 1990-2009 cars only

Gear

TFP SW 1

*TFP SW 3

TFP SW 4

TFP SW 5

Park (Engine ON)

Low

Low

High

High

Reverse EVT (Engine ON)

Low

Low

Low

High

Neutral

Low

Low

High

High

EVT Mode 1 (Engine ON)

Low

Low

High

High

Drive 1st

Low

High

High

High

Drive 2nd

Low

Low

High

Low

EVT Mode 2

High

High

High

High

Drive 3rd

High

High

High

High

Drive 4th

High

High

Low

Low

EVT Mode 2

High

High

High

High

Power Off Low Default

Low

High

High

High

Power Off High Default

High

High

High

High

High = 12V (Switch Open or Pressurized)

Low = 0 volts (Switch Closed or No Pressure)

Note: All TFP switches are normally closed (NC)

*TFP switch 2 does not exist