1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] AFM Delete (2010+)

AFM Delete (2010+)

then our AutoCal is just what you have been looking for

If you are unable to promptly follow these directions and complete your tune

We tend to see power gains in the 15-20hp/20-25ft-lbs range and 1-2mpg improvement

1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] AFM Delete (2010+)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