![1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] we can help your engine](https://cdn.shopify.com/s/files/1/0673/0504/6304/files/BlackBearLogoFullColor_6d47b2e4-fdb3-4fec-9287-0f2461746189.png?v=1708631281)
Pay in 4 interest-free payments of $93.62 Learn more
Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
we can help your engine perform as optimally as possible
Improved Throttle Response
Full Custom Tuning Support: Enables comprehensive calibration options through Black Bear Performance for engine and transmission optimization
3L engines will typically see a 15-25hp/15-20ft-lbs gain (octane dependent)
Other improvements range from improved idle smoothness to better shift performance
1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] we can help your engineBlack 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
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