Brian K Posted January 7, 2012 Report Share Posted January 7, 2012 I see that G Force is advertizing on this forum and they have a Performance chip. I'd like to get better MPG. I also have a 2009 GMC Envoy with a 4.2 and it gets better mileage that our MKX. Has anyone tried their $69 chip. They don't give really much info on installation. I like the idea (that they claim) that it doesn't interfere with the Factory ECU so hopefully no voiding of the warranty. Quote Link to comment Share on other sites More sharing options...
akirby Posted January 8, 2012 Report Share Posted January 8, 2012 I see that G Force is advertizing on this forum and they have a Performance chip. I'd like to get better MPG. I also have a 2009 GMC Envoy with a 4.2 and it gets better mileage that our MKX. Has anyone tried their $69 chip. They don't give really much info on installation. I like the idea (that they claim) that it doesn't interfere with the Factory ECU so hopefully no voiding of the warranty. It doesn't work. Never has and never will. It's just a more sophisticated version of an IAT resistor. Stay far away. There is no magic bullet to improve fuel economy or add a lot of power. Quote Link to comment Share on other sites More sharing options...
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