![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] CAMSHAFTS: For 2014+](https://cdn.shopify.com/s/files/1/0673/0504/6304/files/BlackBearLogoFullColor_a500f417-5c34-4f79-aef1-85de90a75c5d.png?v=1708457722)
Pay in 4 interest-free payments of $93.62 Learn more
Ships within 48 hours · Estimated delivery Jul 28 - Aug 2
CAMSHAFTS: For 2014+
Each gauge comes with interchangeable black & silver bezels and black and white gauge faceplates for multiple color combinations
which includes the tune service and software license
7L up to 30-35hp on a 7
Submit a security deposit for the scan cable hardware ($400)
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] CAMSHAFTS: For 2014+Black 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