| i had 05 duramax with bully dog tripple dog power pup ran real good but tranny would limp on highest setting.bully dog said some trucks would,some wouldnt.not the best answer.any way i bought a 2007 chevy classic,love the power,poor fuel mileage ,17hwy compared to 20 on 05,only 3000 miles how well does the bully dog work on 07?any way to pickup mileage? |