2001-2007 Chevrolet Express 4.8L, 5.3L, 6.0L and 8.1L Custom Tuning

Black Bear Performance offers three different levels of custom tuning service for your 2001-2007 Chevrolet Express 4.8L, 5.3L, 6.0L, and 8.1L. We commonly see gains of 15-30hp, 15-20ft-lbs of torque gains out of the 4.8L/5.3L variations and 6.0L/8.1L engines can see a monster 30-35hp+, 40+ ft-lbs of torque, depending on fuel quality, octane and vehicle condition prior to the tune. Due to frequent issues with 6.0L and 8.1L vehicle sensors, we strongly recommend our AutoCal or Scan cable service with those vehicles. Combine that with improved shift patterns, towing capabilities, throttle response and even fuel economy in many cases and you'll have what feels like a whole new vehicle! Additional service offerings include: Speed and Rev Limiter Increase Efan enable Torque Management Modification/Removal Tire/Gear Change Calibration Accommodation of Most Modifications (Internal engine modifications, superchargers, turbochargers*, upgraded transmissions, etc). *Due to variability in turbocharger systems, they must be evaluated by our tuner prior to committing to any services. Additional tuning service/hardware may be required.