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GMC Jet Performance Chips & Programmers

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Latest Customer Reviews

Jet Performance Module Reviews

seems to do the job

Reviewed By jeff l (POTTSTOWN, PA) Reviewed for a 2003 GMC Envoy —8/22/2013 10:56 AM

I purchased this for my 2003 Envoy XL 4.2L V6 for towing mostly. I also have a K+N cold air intake. My wife and I have noticed a difference in shifting gears, lower RPM's in regular driving and towing, more power where it needs to be, but have not seen a drastic change in fuel economy. Have only had it installed now for 3 weeks. I would certainly recommend this to anyone.

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Jet Performance Programmer Reviews

Works great!

Reviewed By Michael R (BOKOSHE, OK) Reviewed for a 2013 GMC Sierra —8/9/2013 9:23 PM

Easy to program and the options are awesome! There are a lot of different options available and it only takes about 15 minutes to program everything you want. The best thing is you can remove the speed limiter. I have gained about 3-4 mpg on 89 octane. I'm going to program it for 91 and see how it goes. This is well worth the price!

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