1998 Pontiac GTP is hard to start

My '98 GTP is becoming harder and harder to start, it has 87K miles. The air filter was replaced last oil change. My guess is gas filter, plugs and wires; or just give it to the dealer to fix. Ideas?

Thanks.

Well I would start with fuel filter, the plugs and wires its not a bad thing to do considering the mileage you have! If it doesn't fix your problem then go to the dealer!! Chnces are they would suggest doing the filter, plugs and wires first to rule them out.