i just pulled my travel trailer home and noticed white smoke while backing into the driveway. i normally don't see my tailpipe while driving but i had my mirror lower to help backing in. i put it in neutral and gave a little throttle and there's definately white or grey smoke. it's not black like a bus.

is this normal and if not, what does it mean? my 2006 was build in 9/2005, so i know there are some TSBs for it.

 

are we talking a haze? this would be the light smoke that happens when you get on it on a stock truck. Where as when you get on it with a heavily fueled truck it is darker and on most black smoke. I wouldnt worry as long as it is running well. You could run some Howes Meaner Kleaner through it to help decarbon the engine.