Black Bear Tune??

[seattle gmc]

Im thinking about getting a Black Bear Custom tune for my 07 silverado 1500HD classic. The 6.0 in my truck feels very sluggish, unless i really put my foot in it. Driving around seattle is nothing but hills and inclines all throught the city and neighborhoods. I feel like like most of the time when i acelerate from a stop, i step on the gas but only get blaaaahhh. Is this just the nature of a 6.0?

I would like to hear your thoughts and experiences on a custom tune from Black Bear performance. Good, Bad, Problems you might have had? And overall difficulty of getting everything instaled and operating. I did spend some time on their web site looking through the faq section. Is something like this the best bang for the buck or is money better spent somewhere else?

I recently bought the the truck in december with 61,000 miles on it. The truck is is in good working order and i paid to have the truck looked at by two different gm dealers before i made the purchase, and each time everything came back positive.

Every thing appears to be stock, except i think the truck might have an after market cat back exhaust, as there is a bit of rumble (seems louder inside of the cab then any where else though). Everything looked oe when i was under the truck so im not quite sure. I average 10.2 mpg, which is almost intirely city. So if i were to get some added mpg that would be a bonus, but i kind of gave up on expecting my rig to give me any better mpg numbers.