1999-2007 Classic Chevrolet Silverado 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning

Black Bear Performance offers three different levels of custom tuning service for your 1999-2007 Chevrolet Silverado 4.3L, 4.8L, 5.3L and 6.0L (Including Silverado SS!). Gains vary widely by engine type and configuration. 4.3L engines will typically see a 10-15hp/15-20ft-lbs gain 4.8L and 5.3L engines will typically see a 15-30hp/15-20ft-lbs gain. 6.0L will see a 25-30hp/20-25ft-lbs gain on 91+ octane! Power gains, combined 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 t