GM Service Manual Online
For 1990-2009 cars only

Gear

TFP SW 1

*TFP SW 3

TFP SW 4

TFP SW 5

M1 (48 km/h (30 mph))

Low

Low

Low

High

M2 (48 km/h (30 mph))

Low

Low

Low

High

M3 (48 km/h (30 mph))

Low

Low

Low

Low

M4 (48 km/h (30 mph))

High

High

High

High

Power OFF

Low

Low

Low

Low

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