I have now figured it out! My 2006 SS/SC is a chilly willy! When I first start it up and dont let it warm up too good, it will almost stall going into 2nd. It almost reminds me of my Camaro that is carbureted, you have to let it warm up before you even pull it into 1st. Anyways, I believe our stock airbox may fix that problem, but I now let it warm up to about 120-130 before I pull out. Funny thing is, no CELs, only a stutter in 2nd.