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Transmission Range Switch Logic

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Range Switch Logic

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 4 (OD) HI LOW LOW HI
Drive 3 (3) LOW LOW LOW LOW
Drive 2 (2) LOW HI LOW HI
Drive 1 (1) HI HI LOW LOW
  1. HI = Ignition voltage
  2. LOW = 0 volts