2002-2006 Chevrolet Avalanche 5.3L and 8.1L Custom Tuning

Black Bear Performance offers three different levels of custom tuning service for your 2002-2006 Chevrolet Avalanche 5.3L and 8.1L. 20-25hp, 15-20ft-lbs of torque gains are common out of the 5.3L variation and 8.1L engines can see a monster 50+ ft-lbs of torque.  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! Due to frequent issues with 8.1L vehicle sensors, we strongly recommend our AutoCal or Scan cable service with those vehicles. 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