Black Bear Performance is your GM tuning specialist, offering custom tuning services, ECM and TCM tuning, and performance enhancements for GM vehicles. Contact us for horsepower and torque gains today.
Had their tunes on my wife's 6.2l Denali. I highly recommend….
You remember the stories John use to tell us about the the three chinamen playing Fantan? This guy runs up to them and says, "Hey, the world's coming to an end!" and the first one says, "Well, I best go to the mission and pray," and the second one says, "Well, hell, I'm gonna go and buy me a case of Mezcal and six whores," and the third one says "Well, I'm gonna finish the game." I shall finish the game, Doc.
I have a black bear tune on my 5.3. What made the biggest difference was turning off the "active fuel management". But they also changed the shift points, etc with the transmission which helped. It really woke my truck up. It's stock except for a magnaflow muffler. My fuel mileage is about the same (16.8-mostly city).
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