Is A Crew Cab Bigger Than A Double Cab. Chevy and GMC use "Double Cab," Dodge uses "Quad Cab," Ford uses "SuperCab" and Nissan uses king cab. The double cab is available for all the Chevy Silverado trucks.
The Double Cab is tighter and the Crew Cab gives ample room for passengers or extra luggage and gear you need to bring along. Some companies have renamed their Crew Cab. If you're only getting a larger cab for some enclosed storage space, an extended cab will likely work just fine.
Few truck companies actually use the name extended cab for trucks in this category.
A crew cab has two full doors that have room of usually five passengers.
If you're choosing between a Double Cab and a Crew Cab, the Crew Cab will be slightly larger. Superior efficiency scores since the quad cab is generally smaller and lighter than the crew cab. Also, because of the reduced size and weight of the cab, quad cab pickups are likely to get slightly better gas mileage than crew.