Transmission Range (TR) Switch (75)
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The transmission range (TR) switch is an integral part of the transmission control module (TCM). The TR switch input/output circuitry consists of supply voltage (VCC), ground (GND), position signal 1 (Pos 1), and position signal 2 (Pos 2). Each gear range position (P, R, N, D, 4, 3, and 2) corresponds to a particular voltage (1-5 volts) within the TCM.