Regular/Standard Cab: There should only be two doors with no added length in the cab.
Chevrolet/GMC: Regular/Standard
Ram: Regular/Standard
Ford: Regular/Standard
Nissan: Regular/Standard
Toyota: Regular/Standard
Extended Cab: A good rule of thumb with extended cabs is there is more space behind the front seats. Typically this extra space is for extra seating that is folding. There may be a set of half-doors along with the front full-sized set of doors.
Chevrolet/GMC: Extended Cab
Ram: Quad Cab
Ford: SuperCab
Nissan: King Cab
Toyota: XtraCab or Access Cab
Crew Cab: These trucks have more space behind the front seats than what extended cabs have and have four full-sized doors.
Chevrolet/GMC: Crew Cab
Ram: Crew Cab
Ford: SuperCrew
Nissan: Crew Cab
Toyota: Double Cab or CrewMax
Ram produces models with even more space than their Crew Cab version. This is the Mega Cab. It combines their Crew Cab and extending it farther.
- Chevy/GMC: In 2014 Chevy & GMC changed the name of the Extended Cab to Double Cab. They added door handles to the rear doors and changed them to traditional forward-opening doors.
- Dodge/Ram: Club Cab (Extended Cab) was eliminated in 2002 and the addition of the Quad Cab. The Quad Cab has rear door handles while the Club Cab does not. The Mega Cab was introduced in 2006 and offers almost 2 feet of extra cab space.
- Ford: Some Regular Cabs may have an extra window panel & storage space behind the first row that makes it look like a SuperCab (Extended Cab). However, it is only a SuperCab if there is room for passengers in the back.
- Nissan: Nissan does not offer a Regular Cab for the Titan. They also discontinued the Single Cab for the Frontier beginning with the 2001 model year.
- Toyota: Tundra (2007+), the former Access Cab (Extended Cab) was replaced by the Double Cab and the former Double Cab (Crew Cab) was replaced by the CrewMax Cab. They are slightly larger than a traditional Crew Cab and it's rear doors are the same size as the front doors.