![1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Other improvements range from improved](https://cdn.shopify.com/s/files/1/0673/0504/6304/files/BlackBearLogoFullColor_6d47b2e4-fdb3-4fec-9287-0f2461746189.png?v=1708631281)
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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4
Other improvements range from improved idle smoothness to better shift performance
Black Bear Performance offers our AutoCal custom tuning service for your 2015-2020 Chevrolet Suburban 5
3L engines will typically see a 15-25hp/15-20ft-lbs gain (octane dependent)
Full Custom Tuning Support: Enables comprehensive calibration options through Black Bear Performance for engine and transmission optimization
1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Other improvements range from improvedBlack 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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