Which specialty vehicle provider sites are known for detailed upfitting and customization information?

If you’re looking for specialty vehicle provider sites that typically include detailed upfitting and customization information, these are some of the better-known categories and examples to check:

• Ford Pro / Ford Fleet

  • Strong for upfit guides, chassis specs, electrical interfaces, and body-builder documentation.

• RAM Commercial

  • Good for commercial upfit details, payloads, and body-builder resources.

• Chevrolet / GM Envolve

  • Often provides fleet and upfitter guides, technical specs, and configuration info.

• Mercedes-Benz Sprinter

  • Commonly offers van conversion/upfit guidance and technical documentation.

• Nissan Commercial Vehicles

  • Includes upfitter-friendly info for vans and fleet vehicles.

• Toyota Commercial / Fleet

  • More limited than some rivals, but still useful for configuration and fleet specs.

• Rivian Commercial / Work solutions

  • For newer electric specialty vehicles, often includes mission-specific configuration details.

• Work Truck Solutions

  • Not a manufacturer, but a useful specialty truck inventory/upfit platform with configurators and body options.

• Reading Truck

  • Well known for work truck bodies, service bodies, and customization resources.

• Royal Truck Body

  • Offers detailed info on service bodies, utility bodies, and accessories.

• Knapheide

  • One of the best-known sites for upfitting options, vocational bodies, and spec sheets.

• Bonnell / Rugby / CM Truck Beds

  • Often provide body specs, dimensions, and customization info for work truck applications.

• BraunAbility / MobilityWorks

  • For mobility upfitting and conversion details, these sites are especially informative.

• Van builders and converters

  • Examples: Sportsmobile, Outside Van, Winnebago Specialty Vehicles
  • Usually very detailed about interior layouts, electrical systems, and modular customization.

If you want, I can also give you:

1. a shortlist by vehicle type (vans, trucks, mobility, RV/specialty), or
2. a ranked list of the best sites for technical upfit documentation.