Was wondering if anyone has come out with any chip upgrades for 06 CTS-V? Like Superchips, etc... already has upgrades for 06 Corvettes and 5.7 L CTS-V. Not sure how well it would since my V has a misfire at idle and two dealers couldn't get any codes when analyzed, but the car will randomly shake at idle and the shop foreman admits its because of a misfire. Any thoughts? Suggestions! Thanks. InfraredV

our friend Katz is going to come along and recommend you look
into the coil pack .. and i will probably agree with him and i will then
add that also the primary wires may be adding to the problem..

for some reason dealers dont screen out the coil packs well.

let see what he says ...