got a 02 chevy silverado with a 8.1l was wondering about the spark plugs, are those magneto's on the valve cover? looks kinda amazing to me! all look good except 2 of them that look bran new, got the truck 2 months ago and finally got a chance to go over everything. boy is this thing a monster to! 8.1 gotta love it. gas milage is not all that bad either, like 8-10 around town 10-14 highway, pulling trailer 8 mpg..... still not bad alot better then our older dodges! anyone have the 8.1 in there chevy? what seems to be the big problem with them? i do not have any problems currently, just asking for future reference.