I went to wallmart. I know that was the first mistake. Told them I need an oil change just the basic no problem. Then Rey asked the model and year. After I told him it was a 2011 gmc he told me that they can't do the basic oil change on any 2011 GM vehicles. But they could do the $60.00 oil change. Rather than $30.00 . I left and went to a dealer near by they said no problem $19.95 but I have to make an appointment. And that's what I did so I guess the moral is don't go to wallmart.
But do we have an estimate for when the DIC will reach "oil change needed". 10,000 miles like most synthetic vehicles?
My understanding is that the Oil Monitor thinks the oil is regular oil so if you put in Synthetic it will will think you are using the normal stuff. It is based on how hard the engine works using the oil once you reset it so if you do a lot of highway driving you will get more miles out of your oil.