1986 IROC-Z Camaro vs 2004 GMC Envoy

Just a couple friends goofing around, the Envoy wasn't full throttle when we weren't racing, it's capable of quite a bit.

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0-98mph run in the 02 GMC Envoy
0-98mph (governed) run in my 02 Envoy. K&N CAI and Custom Exhaust. Also have a 2" boby lift.

GMC Envoy problems
Having issues with a 2005 gmc envoy, seems to be down on power or not downshifting properly. UPDATE 3/26/15: The problem has since been fixed, clogged catalytic converter was to blame, and a misfire was discovered which probably clogged the cat.

my GMC Envoy
american SUV renowned for comfort and luxury

04 GMC Envoy speaker problems
I do know what the issue is, I did test it and this is a VERY common issue for the GM trucks and SUVs of the era. There is about a 90% chance that I will be filming the installation of the new speakers, well, probably just the one door since it is the same on both sides. Actually uxwbill had a similar issue with this 07 Silverado Classic, here's a link to his video. https://youtu.be/cTElmqWXeVE?t=15m3s Also I do know what the issue is with the Check Engine Light, the parts are on order for that.