DOES A Jeep Grand Cherokee Laredo have fuel injection?

Depends on what year the Jeep was made. Most Jeeps use a fuel rail that receives fuel from the fuel tank, and under pressure, feeds fuel injector plugs located inside the manifold housing. Novice car repair people think the fuel injectors are the spark plugs (spark plugs have flexible wires leading from the distributer cap to the tops of the spark plugs.) Hope this helps.