[rws1012]

Update: truck still running poorly. Took it to the newest Chevy dealer in Tulsa. Was told to tune it up and clean injectors. They said plugs were shot and the wires had cracks in them. I had changed the wires a month ago. LOL!! Wires were perfectly fine. About 100 miles on them. Guess the dealers don't have any diagnostic computers. They just guess at the problem. A tune up there is about $700. Changed the plugs and it drove bad. Took it to the muffler shop and had them check the cats. Said they were good.
A code came up on it and said multiple misfires. Will start checking coils next.