Farmtruc, I recently insatlled the np harness in my blazer and fired it up for the first time. She crunk right up with no problems. I have a few questions though. Do I need to hook up a brake switch to the ls pcm for tcc. If so what pin on the ls pcm do i land it to. Also I had you tune for lt headers, how bad would it be if i ran stock manifolds. Thanks, Derrick Smith aka cottontop11
