Update!! Wheels and tires have been sold. It now has stock wheels installed.
I have a 2008 tahoe forsale.
Wife put around 80k on it and one day it quit.
This vehicle needs a PCM. There is no communication from the ignition to the starter. You can jump the starter relay and get it to crank but it will not fire unless you spray ether into it the fuel pump runs and there is spark. Brought it to a certified mechanic and was told it's pcm. I don't have the time to mess with it before winter and don't want it sitting here any longer as i have other vehicles she can drice. Has almost new tires and very nice wheels on it. Pretty much buying the wheels and tires and getting a vehicle with them. I personally changed the oil every 5000 miles with a wix filter and 10w30 oil.