Brandon, exact same problem here. I've lived with the codes for over a year. They don't seem to affect the car's running at all, but are an annoyance to see on the dash. I've tried a few of the "fixes" and have come to the conclusion it's defective O2 sims. You can get new ones, and heat-wrap them, or get them tuned out with a dyno tune. This will eliminate the sensors permenantly. There's no tuners real close to me that can do this,(for all I know) but I'm planning on more mods in the near future, which would neccesitate a retune anyway. So basically, I decided to wait until these were done before seeking a tuner.
'02 B/B LGM Lts, Corsa. TEA/Trickflow215s/Comp/A&A Blower cam, Powerbond pulley. Harland Sharp roller rockers. A&A S-trimV-3 Vortech.Cobbled fuel system. RPS Twin Carbon clutch/FW, with Tick MC. MGW shifter. I need an intervention. Too late, I blew up the trans/diff. Who knew 650HP would damage the stock drivetrain? :-?
''Go ahead, freak out the neighbors!"