Are you positive it was build with a CAT? As far as I know only the California models had them. Not very many of them that's for sure.Justutt67,
Thanks for responding. My truck is a 98 12 valve. It does not have a tuner. It does have bigger injectors, and the fuel plate is modified. Part of the reason that I failed the emissions test is because the truck does not have a cat. I was told by the shop that since the truck came with a cat, it has to have one on to pass.