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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Specifications >> Transmission Fluid Pressure (TFP) Manual Valve Position Switch Logic

Transmission Fluid Pressure (TFP) Manual Valve Position 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 Fluid Pressure (TFP) Manual Valve Position Switch Logic

Range Signal A B C
Park HI LOW HI
Reverse LOW LOW HI
Neutral HI LOW HI
D4 HI LOW LOW
D3 HI HI LOW
D2 HI HI HI
D1 LOW HI HI
Invalid LOW HI LOW
Invalid LOW LOW LOW
  1. LOW = 0 volts
  2. HI = Ignition voltage
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