1999-2000 Chevrolet Express 4.3L and 5.7L Custom Tuning Tune Installation Option (Scan cable and Traditional tune ONLY):Unblemished PCM (<5% paint missing) [+$125] Open the EFILive Scan and

Open the EFILive Scan and Tune application

If the answer to any of those questions is YES

Gains vary widely based on vehicle condition and modifications

Black Bear Performance offers our AutoCal custom tuning service for your 2015-2020 GMC Yukon 5

Gains vary widely based on engine size but can vary from 15-20hp on a 5

1999-2000 Chevrolet Express 4.3L and 5.7L Custom Tuning Tune Installation Option (Scan cable and Traditional tune ONLY):Unblemished PCM (<5% paint missing) [+$125] Open the EFILive Scan andBlack Bear Performance offers three different levels of custom tuning for your 1999 2000 Chevrolet Express 4. 3L and 5. 7L. From bone stock to heavily modified, we can help your engine perform as optimally as possible. We tend to see power gains in the 10 15hp range on a 4. 3L and 15 20hp on a 5. 7L along with a 1 2mpg improvement depending on vehicle condition and configuration. Other improvements range from improved idle smoothness to better shift