I just got a new Bully Dog PowerPup and I have it on the first setting... very impressive acceleration and power, but I'm not to crazy about getting the truck moving when its cold; its seems like a Military cutV that's goin' to rattle apart. I have the '05 Duramax with the Z6 manual trans. Does anybody have the same response with this programmer? I do admit that its much better when its warmed up. Any feed back would be appreciated.