Need Spark Plugs and Wire help need.

Looking for Plug and wire for my 02 denali and was wondering anyone have any recommendation on after market stuff. how hard is it to change them out? thanks

Stick with AC-Delco and you won't be disappointed. Check the local supply stores and compare pricing. This can be done on the internet as well.

How hard is it? Standard like any other cars or truck? Real easy to get to?

I believe that your vehicle has separate coils on the valve covers with individual wires going to the respective plug for each cylinder. No mystery here. I would however, make sure that I had the VIN# handy as these wires are different lengths, If only by 1" which will not work if too short. It should prove to be a very simple task.