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GMC Envoy 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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DiabloSport inTune I-1000 Tuner Reviews


Very easy to use so far.

Reviewed By Michael H (Las Vegas, NV) Reviewed for a 2010 Dodge Ram —1/26/2015 9:37 AM

Great little device to quickly maximize your engine's performance. I have not gotten to the point of uploading any custom tunes, but I do like the ability to make minor corrections to the PCM for variables such as tire size and having a diagnostic reader available as well. As for the performance increase, IMHO it is an accumulative difference. Meaning that it seems much more noticeable with other bolt-on mods (CAI, headers, etc)

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Edge Insight CS/CTS Monitors Reviews


awesome product

Reviewed By Jase R (OLIVE BRANCH, MS) Reviewed for a 2005 Ford F-350 —1/26/2015 8:48 AM

Great monitoring device. Easy setup. Expensive to add egt or fuel pressure sensor

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Year Range For GMC Envoy Performance Chips & Programmers