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2003 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 PC Interface - USB Cable Kit Reviews


Great buy

Reviewed By Kolton B (LEVELLAND, TX) Reviewed for a 2009 GMC Sierra —7/19/2016 11:58 PM

Got here extremely fast, works excellent.

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Superchips Cortex Programmer Reviews


Woke up my 2013 Sierra

Reviewed By Timothy O (DAYTON, TX) Reviewed for a 2013 GMC Sierra —3/12/2016 4:39 AM

Have a 2013 Sierra crew cab 4x4, it ran good but with the Superchips programmer it now runs great! When I step on it the truck almost jumps. Maybe a slight boost in MPG. Highly recommend if you're looking for a performance boost.

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Year Range For GMC Envoy Performance Chips & Programmers