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] 15-20hp gains are common out

15-20hp gains are common out of this 5

3L models and 6

Each gauge comes with interchangeable black & silver bezels and black and white gauge faceplates for multiple color combinations

If the answer to any of those questions is YES

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] 15-20hp gains are common outBlack 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