I just bought a bottle today and i'm about to go try it. I'll let you know how it goes.

 

Worked great. Nice throttle response and my ideling has a nice purr with my glasspack. Going to dump the other half in my gas tank when I fill it tomorrow for going up north.

 

Hey if the carbon is caught in your egr valve, will the seafoam work also? Or do I have to remove the egr valve and clean it myself?

 

I've used it on my other cars, and I will prob use it on my Envoy once I pick it up tomorrow or Thurs.