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2004 GMC Yukon Performance Chips & Programmers

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Latest Customer Reviews

Superchips Flashpaq Tuner Reviews


More power and better mpg. Stop thinking about it and get it!

Reviewed By Clint B (POCATELLO, ID) Reviewed for a 2004 GMC Yukon —9/18/2014 11:59 PM

All the tunes have a noticeable gain in power and throttle response. I use the same programmer for my 2004 Yukon and 2001 Silverado. Both are on the "mileage xs" tune. I get about 17 mpg city and 20.5 highway in both vehicles. I should mention that I also have exhaust, CAI, and shorty headers on both vehicles. All of those things helped increase mpg. The programmer was the last thing I added and it did give me an increase in mpg from what I was already getting.

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Hypertech Max Energy Programmer Reviews


GREAT ITEM!!! GREAT PRICE!!

Reviewed By Kerrick B (Manhattan, KS) Reviewed for a 2004 GMC Yukon —5/20/2009 7:19 AM

this item made my 04 gmc yukon run like a monster on the highway. great power

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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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