What would make a 2002 silverado 43v6 misfire lose power and then smooth out and run fine till the next time?
Could be oxygen sensors (located in the exhaust manifolds),
water in gas, stopped up injectors, loose air hoses. Does it happen
when its cold, hot, turning, been idleing for a while, in traffic,
or going down the interstate? need more info.
My 4.3 ran like this for a while then it began dying randomly
and would not restart for 15 minutes or longer, turned out to be
the ignition module (a.k.a. "the black bannana") it's inside the
distributor, this won't be the case for you if you have C.O.P (Coil
Over Plug) or H.E.I. (High Energy Ignition) mines 8 years older
than yours I don't know what your engine runs.