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GMC Yukon Performance Monitors

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Latest Customer Reviews

Bully Dog Triple Dog GT Tuner (49-State Legal) Reviews


2003 yokon 5.3

Reviewed By William L (Superior, WI) Reviewed for a 2003 GMC Yukon —9/10/2015 5:58 PM

WoW! I went from 12.5 to 16 in the city, using 91 oct on performance mode, shift points firm. Versus 87 oct in stock. It's how you drive it that matters. The driving coach is way cool. And it's fast too!

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Hypertech HyperPAC Reviews


Useful product

Reviewed By Pavel B (Albuquerque, NM) Reviewed for a 2004 GMC Yukon —2/7/2008 10:33 PM

I bought HyperPAC hoping to achieve some performance gains and for the various diagnostics programs it offers. Installation is simple and straightforward, uploading performance tunes takes less than 5 minutes. Performance gains are consistent with the dyno charts Hypetech has on their website - modest but noticeable. I tow a trailer and acceleration from standstill and throttle response are better. My benchmark is a steep grade on I-25 before Santa Fe. With the stock tune the rig tops at 50mph on 2nd; after installing the premium fuel tune I was able to take it at 60mph. With this tune engine seems to develop more hp after 4000rpm than with the stock tune. I also like the engine monitor program which allows me to check on transmission temp. I also used the dyno program but you need to weight your truck for accurate results. Regarding fuel economy, there seems to be a modest improvement (14.2 city vs. 13.9 with the stock tune on winter gas-ethanol mix). In sum, I find this product to be useful and fun to use but do not expect miracles.

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DiabloSport Trinity T-1000 Programmer Reviews


Great Product for 2015 3.5 Ecoboost

Reviewed By Shayne P (Milford, NH) Reviewed for a 2015 Ford F-150 —5/26/2016 11:48 AM

I was skeptical about purchasing product after reading reviews and issues with my vehicle. I made sure product was up to date with latest software before I tried, and have had no problems. Definitely more power, and shifting is vastly improved. I am running performance tune and have not seen much drop in MPG from stock. Very impressed and I would recommend

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