gmc jimmy spark plug replacement.

I have a 2000 gmc jimmy with 57k on the odo. It has the 4.3L the book says that with the platinum plugs they should be changed at 100k. is this correct and if so how do i replace them? what special tools do i need to
access them or is there a proper sequence to their removal? The truck is running fine and has been trouble free, but would like to know how to do it when the time comes. I also have a 02 Chevrolet S10 with the 2.2L does anyone know the secret to working on it. They sure do pack the engine compartment full of stuff.
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Well, the replacement on the Jimmy is simple really, a couple of the plugs are a bear and will require a swivel socket and an extension, When you replace the #4 and #6 you can access them by turning the wheels so it exposes the engine on the right, and on the left just turn the wheels the opposite way, the middle plug on the left #3 will be much of a bear, this is the one that looks impossible because of the motor mount, this is were the swivel comes in HAVE FUN!

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Don't believe the factory saying they'll last 100K.
Dump them ASAP, and don't get fancy, replace them with the exact same plugs.
You'll get a bit of sticker shock when you go to buy the AC Delco Plugs, but have peace of mind knowing that a good running vehicle right now is very good thing to have.
A few tips to remember, if you can, blow away any dirt/dust away from where the spark plugs sit, be careful on the wire/boot removal twisting them rotationally before trying to yank them, (A plastic Boot Puller is of help sometimes) double check the proper gap, and don't torque them in like a gorilla.
Yep, you might need swivel extensions in varying lengths, and the proper size spark plug socket. Do the changeout with the engine cold. Mark
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Those would be AC-41932 Platinum plugs in the 4.3 I believe. The problem with letting the plugs go 100K isn't so much that the plugs wear some (they do but the ignition can still fire them with little problem) what happens is they RUST into the head and break off when you try to remove them. Not fun then. I swap plugs at 40-50K regardless, sooner on older vehicles. Tools wise you need a good 3/8" ratchet two 6" extensions and a swivel type 5/8" plug socket. This socket has a built in swivel that you will need to get behind the steering shaft on the drivers side. Don't bother trying to use a swivel between a normal socket it will drive you nuts because it moves too much. No real special sequence just do them one at a time and make sure the plug wires lock on correctly. Also at 50-60K your probably due to change the plug wires / cap / rotor / serp. belt, probably due to swap out the DexCool as well. Check the hoses REAL close, the newer hoses can look great and fail the next day.
On the 2.2 the plugs are MUCH easier but the same tools can be used.
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