Hello all - Newbie from SoCal. I have an issue I hope you can help me out with. I have consulted several mechanics on this and I cannot get a definitive answer. 2000 Silverado 4.8L 109,500 miles. The first time I start it every day, no matter the time, it starts right up. After that, it takes a while to start. I've gotten "fuel pump", but why does it start the 1st time each day?

Thanks for any advice