5.3 Liter Maintenance

I have a 2003 sierra half ton 4wd pick-up truck with a 5.3 liter engine. I've had it since new. The book tells me to change spark plugs at 100,000 miles. Although I haven't hit 100k yet I'm sneaking up on it. Is there any virute in using premium plugs and/or wire or just OEM stuff, if so what is your recommendation. I'm generally satisfied with the truck's performance both from a fuel economy and power point of view, but if there is an improvement to be had easily I'm all for taking advantage of it. I use full synthetic oil and a K&N Air cleaner otherwise everything is as it came new.

Welcome to AF, stay with the Iridium AC Delco plugs and premium wires. Fuel filter of course, clean the throttle body also.