[hdrolling]

Just to add to this older post, yes some auto car washes do fit dually trucks. The width shouldn't matter because the rear doesn't stick out any more than the mirrors.

You can always ask or look up the brand car wash online, here is the link to the brand I use and it specifically says "Including Duallys"

Scroll down in the link to were it says "Vehicle Positioning"
http://www.pdqinc.com/car-wash-equip...autoxpress.asp

There is also youtubes videos showing people running the DRW in the auto car washes. You can look through those and see if any of the same brand washes are in your area.