How to, homemade snorkel kit 1999 Chevy Silverado?

sure, dryer hose and hose clamps will do a lot for the plumbing, the heat under the engine can be taken care of by wrapping the hose in exhaust insulation, used to be asbestos, not anymore but still good, you can use just about any type of pipe for the outside pickup, however, it is going to look terrible, unless you route it up the back of the cab, like an exhaust pipe, however, with a prefilter off of any tractor or farm implement you can find, I once made one for a diesel powered pickup which was made with 3 inch exhaust pipe, unioned with rubber hose from a cloths dryer, routed the pipe up the outside of the back side of the cab, got a precleaner off of a freeman 2 wire baler, then tied everything to the frame and body with copius amounts of baleing wire...it worked, was butt ugly, and everyone made fun of it, but it allowed an old style diesel 4x4 to run with water over the hood, and cross streams with impunity...good luck.