Hey Scotty, I have a 99 tahoe with 5.7 vortec. It runs perfectly but does not want to start easily excrept for the first cold start. The rest of the day is excessive cranking and it finally starts. I cleaned the mass airflow sensor and throttle body and plan to change plugs wires cap and rotor as well as fuel filter this weekend. If this fails to fix the problem, what else should I look at ?