07 Silverado 4x4 pr.oblems

20

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

1,825

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

1 out of 1 people think this is helpful.
20

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

1 out of 1 people think this is helpful.
20

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

1 out of 1 people think this is helpful.

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