Before revision: Ladder frame pickup truck chassis holds the vehicle's engine, drivetrain, suspension, and wheels The unibody - for unitized body - is also a form of a frame A vehicle frame, also historically known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.
After revision: theLadder frame pickup truck chassis holds the vehicle's engine, drivetrain, suspension, and wheels The unibody - for unitized body - is also a form of a frame A vehicle frame, also historically known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.