My 06 g6 gtp has just recently accumilated 100,000 miles and today I replaced the spark plugs and wires. The plugs were .013-.016mm out of gap as my 3.9L requires .043 and they were .056-.059 and most of the iridium electrode was burnt down. I installed another set of the AC-Delco iridiums and some Magnecor KV 85 Competition 8.5mm wires part #65273 that are made in the USA (fit the 3.5 and 3.9L)!!!! They are a great deal for about or less than the price of stock wires, and they are red! I will try to post a pic of them on my GTP.
Last edited by CalsGTP; 12-26-2010 at 06:20 PM.