Resource center

Manuals, fitment & buying guides

Owner’s and install manuals, spec sheets, warranty registration and fitment guides for the equipment we install. Maker links open the maker’s own site.

Payload calculator

Payload = GVWR − curb weight − upfit weight. Enter your own numbers in pounds, from the door-jamb sticker, a scale ticket and the body and equipment spec sheets.

Enter GVWR and curb weight.

Estimate only. Uses only the numbers you enter. Weigh the finished truck and check axle ratings (GAWR) and the chassis maker's body builder guide before loading. We confirm weights on every quote.

Specs and weights are supplied by the manufacturer and may vary. Confirm details with VSI before ordering.

Series specs

Can't find what you need?

Tell us the truck and the equipment. We'll find the document or quote the upfit.