Dom's Vehicle is a Military Green Jeep Wrangler.

It has a sunroof on the top, which Dom can easily pop out of the top and shoot his weapons from.

He keeps extra cargo in the back, in utility tackleboxes loaded with things such as tools, like

tire irons and wrenches, and a crate that has many ammunition packed inside.

Also to the right of the crate is a long rectangular crate that holds an RPG Missile, and

a container of bullets, pistols, shotguns, and even melee weapons such as a baseball bat, a crowbar, a monkey wrench, a tire iron, a big rock, a golf club, and etc. including a chainsaw and a machete.

Dom states he keeps even more of his weapons, mainly explosives in a Cargo hold.

Dom's Wrangler.