I just purchased a 2002 Sierra 2500HD CCSB with the LB7. I took it to have the emission testing done today and they operator told me that torque was about 640. I believe this has got to be quite a bit above stock torque numbers. The previous owner put a SuperChips sticker on the truck, so I'm wondering if the tune is still on the truck? I didn't receive the tuner with the truck, but I don't know if the ECM still holds the tune. Is there a way to tell if there is a tune on the ECM and if so, how can I reset it back to a factory tune? I want to be able to control it and can't without the tuner. Thanks in advance!

find someone with efi live and if they know what their doing they can tell u wether it still has the tune.
also if you want the truck stock anyone with efi live can make a stock factory tune from other trucks with the same op system
good luck

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03 lb7
lift pump
efi live self tuned
centerlink
tie rod sleeves
exhaust
latter bars
and some extras