Transmission Fluid Pressure (TFP) Manual Valve Position Switch Logic

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Transmission Fluid Pressure (TFP) Manual Valve Position Switch Logic
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
TFP Manual Valve Position Switch Logic

Gear Selector Position Signal A Signal B Signal C
Park/Neutral HI LOW HI
Reverse LOW LOW HI
Drive 4 HI LOW LOW
Drive 3 HI HI LOW
Drive 2 HI HI HI
Drive 1 LOW HI HI
Invalid LOW HI LOW
LOW LOW LOW
  • HI = Ignition voltage
  • LOW = 0 voltage
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.