[rjirvine]

I ordered a set of plugs and stock plug wires on-line. I have a 2000 Silverado extended cab, 5.3. The original plugs were platinum, and the ones I ordered are the iridiums p/n 41-985. I understand GM uses the iridiums exclusively now. Can I use a regular 5/8" spark plug socket to remove them? I saw a TSB or something that mentioned using an extended socket or the insulator may crack. I'm not sure if a "standard" socket will work or not.

Any advice before I dig into it? The plugs didn't come with anti-sieze compound, which I will put on. I will also put some dielectric grease on the metal fittings and boots before putting the plug wires on. It looks like the rear plugs are going to be a bitch.

Anyone know if the PCM needs to be changed because the original plugs had a .060 gap, and the iridiums have a .040? I have 92k miles on my vehicle and don't think they have ever been changed, do you think the performance will improve?