Well for what i's worth, my BIL and I did a tune up on his Silvy with a 6.0
2500 trailer options truck back in Apr. We bought AC iridium plugs 4111's
and AC wires from Rock. They had the plugs for 4.78. Needed 8.
AC had has a rebate for the plugs so they come out to around 2.00
and change. We used AC wires kit 748HH which was 65.00. We
also cleaned out the throttle body with cleaner. When he went to
drive it, he came back and said it had the pickup and
smooth running as it did when it was new.
The ride had pretty close to 90,000 on it.
He then hauled his 30 ft 5th wheeler up to Pismo and told me
that he would have to fill up at Lompoc before as the tank was
really close to empty. This time he told me the tank slowed
just a bit under a 1/4 of a tank ! I was pretty shocked that he got
this much better mileage. He was very pleased to say the least.
So the AC plugs and wire kit really worked well on his ride. I'm
sure cleaning out the throttle body with cleaner helped too.
So for around 100.00 bucks using AC parts and using the rebate
it paid off. I think the rebate runs on certain AC parts until the
end of June. AC was fast in sending back his rebate money.
We got the parts at Rock Auto and they shipped fast. One thing
is though, we bought the belts from a local dealer here in case
we might have fitment probs. The dealer charged 107.00 ! for
two AC belts. One being the main belt, the other the AC belt.
Boy Tom Bell Chevrolet put the hurts on the belt price,