07 Silverado 4x4 pr.oblems

Asked by Jan 08, 2012 at 08:13 PM about the 2007 Chevrolet Silverado 1500 LT1 Crew Cab 4WD

Question type: Maintenance & Repair

ok where to start. My service 4 wheel drive came on. The light on the dash nobe is not on. I checked all fuses, changed the dash switch. still not working. checked voltage in actuator yhe only one i was getting a reading from was the pink wire even when i changed it into 4hi. Dont know if that is normal, didnt get any voltage readings from any of the other 3 wires. So i went and bought a actuator and  changed that. Still not working.
Any solutions to trouble shooting from here would be appreactated. thanks

3 Answers

1,655

need a scan tool to the codes just as you do for engine diagnostics, even if actuator was the prblem you need to clear codes and reset system for to work properly

The problem was actually the TCCM. I change that out and got the truck re flashed at the dealer. The flash cost me 1 hour of labor. 4x4 works now and the other good thing is I know all the parts are new. Lol

Thanks for your input. Ya the truck needed to be re programmed. You were correct with your suggestion .

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