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Black Bear Performance offers three different levels of custom tuning service for your 1999-2007 GMC Sierra 4.3L, 4.8L, 5.3L and 6.0L (Including Sierra Denali!).
Gains vary widely by engine type and configuration.
4.3L engines will typically see a 10-15hp gain
4.8L and 5.3L engines will typically see a 15-25hp gain.
6.0L will see a 25-30hp 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 tuning service/hardware may be required.
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