For 1990-2009 cars

The following are supported by a front crossmember frame which is rigidly bolted to the body at six locations:

• | The engine

• | The front suspension lower control arms

• | The steering linkage

Two rubber mounts secure the engine to the front crossmember frame. The underbody frame (cradle) must be properly aligned to maintain the correct suspension and wheel alignment.

The individual underbody components contribute directly to the overall strength of the unibody. Use proper welding techniques during service operations. Refer to Collision Repair for welding information and for vehicle preparation.

The components must be corrosion protected whenever body repair operations damage or destroy the original sealing surfaces. Use two part catalyzed primer such as PPG DP40 or equivalent when corrosion protection is needed on welded surfaces. Use GM Goodwrench Anti-Corrosion Compound P/N 12346225 or equivalent when needing a general corrosion protectant. Do not combine paint systems. refer to the paint manufacturer's recommendations.