I stopped back by the local shop again, and he seems to think it's related to fuel injection (CSFI) poppet valves and that I need to take it to a dealership to have the fuel system professionally cleaned. He printed out a service bulletin from Chevy, Ref Number 00-06-04-003B that explains that a deposit build up on the CSFI poppet valve ball and seat may cause the poppet ball to stick open or closed causing cylinder misfire condition. He also said that the misfire is only on the one row of cylinders. Does this resemble anyone else's problem, I want to be sure this is the problem before I spend the money to get it fixed at a dealership. Would there be any other way to correct the problem.
Thanks,
Matt