I have a 2005 Z71 and having trouble with the service light .1. (under warranty) brought to dealer changed switch,and updated a program did not work. 2. brought back going into 4wd at its will, changed servo motor and switch.did not work. 3. Brought back said switch shorted changed switch . 4. going into 4wd sometimes on start up of truck. Need help now going into 4wd sometimes on start up of truck and I think they don't have a clue, just parts changing.Thanks for any info.

 

I too have a 2005 Z71. I have noticed my transfer case and or my transimission slipping at traffic lights. It only has 30,000 miles on it. That makes me worry a little bit.

Do you have any brake problems? Do you have rear drums or discs?

 

Got my truck back they changed the Computer module , now all electrical parts have been changed.Waiting to see if 4wd will act up again. On your Question about brakes no problems as of now. I have 31000 miles on it.