Is this cart tall enough to work under a lifted vehicle?

Exact height not specified — measure your workspace before ordering to confirm clearance under your vehicle or lift height.

Will the wheels lock to keep the cart in place while I work?

Wheel locking mechanism not confirmed in the specs — verify locking capability if that's important for your setup.

Can I add drawers or shelves to this cart later?

Expandability not specified — the tray top ships as configured, so test your intended layout before making modifications.