i need help with my tune as no one has a dyno to tune it on it was street tuned by a tuner but the tune is not good at all. ive gone back 3 times with no luck its an 03 Silverado ss awd its a stock bottom end with ms4 cam kit form tsp stock intake and throttle body. I have a 4000 yank converter with a probuilt automatic kit in the tranny it runs fine while cruising but just stumbles coming to a stop after running hard or cruising for a long time and also when the ac is on. im a first time user of hp tuner as I just bought it so I don't know much just enough to be dangerous tune 1 was from tuner the other is the one ive been messing with which is better but not perfect