I replaced both plugs and wires on my 2008. From a note I sent to myself at the time, it looks like the plugs are AC Delco 41-933 (the PCM part number was RP030010) I can't remember where I bought them, but I see they're $5.61/plug at Rock Auto. Check to make sure I have the plug number correct--you can always pull one out and get the number off of it.
I bought the wires at my dealer...reasonable and completely worth it as they fit perfectly.
I bought the wires at my dealer...reasonable and completely worth it as they fit perfectly.
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