i have a 99 gmc yukon i got from my bro-in-law. it need some real work. i replace the hubs,frt cv alxes,shocks 4, brakes frt and rear changed all oils and gear oils, even transmission, also brought the blue auto-trac fluid for trans-fer case, fuel filter and grease complete truck. but my service 4wd light comes on now on the dash, when i go from 2wd to 4wd and the only way to get it back to 2wd is i have to stop and cut the truck off then restart it place in drive and hit the 2wd button and it will return to 2wd. HELP do i need to replace the 2 senors on this system for it to work right or it there something else
i'm assuming you have the 4 button activate the left fringe of the sprint. maximum circumstances they set a 2725 code which does not activate a delicate to sign a difficulty. that's an inner change failure,replace it. i'm exceedingly constructive the guidelines say that we are actually not think to get own or harsh in the direction of yet another. I do have 15+ years GM education and function seen this code thousands of circumstances although I do agree that codes could desire to be checked first and a few easy potential and floor tests. i'm sorry i did not write that each and one and all out in my first answer.
It's not the wheel sensors. It's often the transfer case position sensor switch or control switch. But mainly you need to get the module scanned for the code. Don't just start replacing $400 parts on a guess.
