Dealer abuse,again?venting

My wife got a new (to us) '02 Chevy truck Sunday.They said to bring it back today and they would fill the tank and wash it (it was dirty from the dust storm Saturday).She took it in today,waited a couple of hours and got the truck back.Hosed off,and with 30 additional miles on the odometer.Which she didn't notice until later in a rush to get back to work.This was on her 45 minute lunch break as well.I haven't noticed anything mechanically wrong,the engine bay is dirty like it's been down dirt roads when it was spotless before.No rubber splattered on the quarters or wheel wells.
We know this was supposed to be a courtesy thing they did(?),which we regret now,but I sure hope it doesn't turn out like the Mustang thread of the same topic on here.This is a Buick-Pontiac-GMC dealer,btw.