I have a used Bully Dog Triple Dog GT Tuner for 2001-2011 Duramax, 1999-2011 Powerstrokes and 5.9l and 6.7l Cummins.
Has 3 power levels: Tow (25hp increase) Performance (50hp increase) and Extreme (100-119hp increase)
Sold the truck I was using it on and have no need for it anymore. You definitely notice an increase in power on all 3 levels
New was $650+ seeling for $500 OBO
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