1998-2000 GMC Sierra 4.3L, 5.0L, 5.7L and 7.4L Custom Tuning Tune Installation Option (Scan cable and Traditional tune ONLY):Unblemished PCM (<5% paint missing) [+$125] “you-way-go”) Gauge is a must

“you-way-go”) Gauge is a must for anyone looking to maximize engine power and safety

CAMSHAFTS: For 2014+

Submit a security deposit for the scan cable hardware ($400)

7L up to 30-35hp on a 7

Please contact us for our mail-in form to include with your PCM

1998-2000 GMC Sierra 4.3L, 5.0L, 5.7L and 7.4L Custom Tuning Tune Installation Option (Scan cable and Traditional tune ONLY):Unblemished PCM (<5% paint missing) [+$125] “you-way-go”) Gauge is a mustBlack Bear Performance offers three different levels of custom tuning service for your 1998 2000 Classic GMC Sierra. Gains vary widely based on engine size but can vary from 10 15hp on a 4. 3L up to 30 35hp on a 7. 4L. From bone stock to heavily modified, we can help your engine perform as optimally as possible. Other improvements range from improved idle smoothness to better automatic AND manual shift performance, improved throttle response and