1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Manual transmission vehicles will see

Manual transmission vehicles will see a big improvement in shift speed and feel

Please check with us first on availability

we can help your engine perform as optimally as possible

*Due to variability in turbocharger systems

Black Bear Performance offers our AutoCal custom tuning service for your 2015-2020 Chevrolet Suburban 5

1999-2007 Classic GMC Sierra 1500 4.3L, 4.8L, 5.3L and 6.0L Custom Tuning Tune Service:Traditional [$325] Manual transmission vehicles will seeBlack 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