![1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] *Due to variability in turbocharger](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 31 - Aug 5
*Due to variability in turbocharger systems
3L engines will typically see a 15-25hp/15-20ft-lbs gain (octane dependent)
Black Bear Performance offers three different levels of custom tuning service for your 1998-2000 Chevrolet S10 or Blazer 4
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] *Due to variability in turbochargerBlack 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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