Ive got a 2000 Chevy Silverado 1500 series 4WD 5.3 V8

Its nearing 100k miles now and the past couple days ive been having problems starting it, It starts every time, but sometimes it takes a couple tries, or I need to hold the starter down for a while. And sometimes it starts then dies. Is this a spark plug problem?

 

Could be pluged fuel filter, weak fuel pump. At 100k its a good idea to do a total tune-up, pluges, wires, air filter ect.