Engine light on and runs rough

[liftlawssuck]

Hi Guys,
I have an 05 Tahoe with a 5.3 that has an check engine light on. I have PO131, PO171, PO300, and PO102 for codes that were pulled. The symptoms are that it will run rough sometimes at idle and the exhaust smells really bad. It started about a year ago but then it was every so often and didn't throw a code. Since it has been getting worse. Now the light is on.

With 165k mile on I decided to change the intake gasket. Didn't notice any tell tale signs of leaking when it was off but changed it anyways. I also replaced plugs and wires.

When I pulled the plugs I noticed the drivers side all were black like running rich. The passenger side was nice white looking. After changing all the above it still runs the same way.

Any thoughts??

Thanks, Brian