![1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Black Bear Performance offers our](https://cdn.shopify.com/s/files/1/0673/0504/6304/files/BlackBearLogoFullColor_6d47b2e4-fdb3-4fec-9287-0f2461746189.png?v=1708631281)
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Black Bear Performance offers our AutoCal custom tuning service for your 2015-2020 Chevrolet Suburban 5
Improved Throttle Response
Please check with us first on availability
Other improvements range from improved idle smoothness to better shift performance
3L engines will typically see a 15-25hp/15-20ft-lbs gain (octane dependent)
1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Black Bear Performance offers ourBlack 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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