K 1500 Truck 4WD V8-393 6.5L DSL VIN P (1995)
Four Wheel Drive Selector Switch: Description and Operation
Transfer Case Select Switch Assembly
MECHANICAL SHIFT: This switch assembly is used to indicate the position of the transfer case select lever. When four wheel drive (4WD) low is
selected a ground path is provided, changing the 4WD low input signal from B+ to zero voltage at the Powertrain Control Module (PCM). The 4WD
low switch signal input is used to correct the transmission output speed signal from the VSS buffer module to the PCM, to compensate for the transfer
case gear reduction. This 4WD low switch is part of the transfer case shift select switch assembly and is attached to the 4WD shift detent lever bracket.
