Want to change the plugs on a 99 blazer
What is the best to go with?

Should I get wires and plugs? I don't know much about this.

Only use AC DELCO PLATINUM'S Gapped at .060 (They were made for your truck) You will regret putting anything else in, good luck with the driver's side middle plug, Jack it up and remove the wheel's and go in thru the wheel well to get them out. Bring lot's of socket extensions and wobble sockets. Also use a dab of never sieze on the new plug threads and don't forget to put some Dielectric grease on the spark plug boots.... Check your wires for any damage, leaks or cracks, if they look alright then you should be good to go. Don't forget to change your fuel filter...:nono:

DINO.....

What about the NGK G Power Platinum
http://www.ngksparkplugs.com/products/cars_trucks_suvs/gpower.asp?nav=11000&country=US

And the NGK Wire Sets?
http://www.ngksparkplugs.com/products/cars_trucks_suvs/wiresets.asp?nav=11600&country=US

It will be your choice in the end, AC Delco Plat's gapped at .060 were made for your truck. That's what's in mine and it runs like new. I never used NGK plugs before so I don't know if they are any good. The NGK wires look good, so if your's are crappie, then change them.