Reviewed By joe k (Davison, MI) Reviewed for a 2003 GMC Yukon —4/21/2014 8:17 PM
I like the Hypertech it was a little tricky to install the program but once I got it figured out....its well worth it...def noticed a difference.
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 Chad M (Midlothian, TX) Reviewed for a 2015 Ford F-150 —8/15/2015 8:16 AM
It calibrated my speedometer since I put larger tires on. It takes trial and error. Just because you put 35" tires on doesn't mean you just set this to 35". You have to test it. I have 34" tires. Had to set this thing to 32.5" for the speedo to be accurate. Unfortunately, this is my only option at this time since the tuners are unable to calibrate the 2015 F-150 at this time. Dealership wanted the same price as this calibrator for a one time change. Good product.