First, Had an older Tahoe and am picky. Took it in for oil change and when I got home, the bumper had a dent. They said you should have pointed it out before you left. Now with a new 2007 denali, had it in for service at a different dealer,different state, it is black in color and was just washed by me. They decided to wash it after service and scratched the paint protection up very badly. ( I have it all along the bottom sides due to rocks kicking up because I have the automatic running boards). They had told me before they do not wash black vehicles, but did anyway. They said they would buff it, I do not trust them to do any paint work. My question is has anyone had problems like this from a dealer? I am not wanting to take it back to any dealer anymore but I will need service and most likely warranty work.