Recommend an Upholstery Cleaner/Vac?

[Great68]

Over the past few weeks I've been using my truck for truckly landscaping duties hauling many loads of dirt & gravel.

The interior is pretty dirty now from muddy work boots and clothes and so on, but since the job is done I want to give the truck a good upholstery cleaning.

Any good recommendations on an upholstery cleaning vac? Steam? etc?

[Klondike]

You can rent a rug doctor from most supermarkets to clean your upholstery. I use a shopvac to clean my carpets, because normal household vacuums don't cut it for me.