I just got done getting transmission replaced 6 months ago, and I had to replace timing chain and thrust washers couple of weeks ago and then another light comes on. I had new tires put on my vehicle three or four months ago and now I have a code light coming on to have the tire monitoring system serviced I mean at 139000 everything starts to fall apart on this vehicle. I hate GMC's would never buy another one even if they gave me the money to buy it with.....