The unitized body construction incorporated integral front and rear frame side rails.

The engine, front suspension lower control arms and steering gear are supported by a frame which is bolted to the body through rubber insulators at four locations. Two rubber insulated struts secure the engine to the upper rail of the engine compartment front panel.

Chassis components and body components share mounting provisions for the front suspension system. Chassis components which share mounting provisions consist of the suspension lower control arms and the frame. Body components which share mounting provisions consist of the engine compartment side panels. Properly align the underbody in order to maintain the correct suspension and wheel alignment.

Individual underbody components contribute directly to the overall strength of the unibody. Use proper welding techniques during service repair operations. The components must be corrosion protected whenever body repair operations damage or destroy the original sealing surfaces. Use a two part catalyzed primer such as PPG DP40 or equivalent, when corrosion protection to welded surfaces is needed. For general corrosion protection, use anti-corrosion compound GM P/N 12346225 or equivalent. Do not combine paint systems. See the paint manufacturer's recommendations.

Symmetrical reference points are two corresponding points on opposite sides of the centerline that are equal specifications in length, width, and height. Use symmetrical reference points in order to make quick checks in order to determine underbody structural damage.

Asymmetrical reference points are two corresponding reference points that have different measurements. If a quick cross check is performed and the measurements are unequal, refer to the dimension charts in order to determine if the measuring points are symmetrical or asymmetrical. Underbody dimensions charts list the specifications from both corresponding points when the measurements are equal.