Reviewed By Frankie B (WAVERLY, KS) Reviewed for a 2013 GMC Yukon —5/18/2016 11:23 AM
Fairly easy to download and install tuner. Screen large enough to easily read but small enough to not be obtrusive. Good menu services.
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.
Reviewed By Thomas Y (Saint Louis, MO) Reviewed for a 2006 Chrysler 300 —8/28/2016 11:22 AM
This is how Chrysler should have had my car programmed at the factory. I have a Borla performance exhaust system and am using the factory CAI (cold air intake) with the stock paper air filter. The Diablo setup I'm using is their 91-Octane factory tune, with raised shift points (6000 rpm as opposed to the stock 5800 rpm), increased shift firmness, and autostick auto upshift mode 1. My fuel economy has increased, which more than offsets the slight extra cost of having to use premium gas.
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