Bad O2's?
 

Hello, I drive a 2000 Camaro SS and upon starting the car it just has a horribly clunky idle for about 5 seconds and then starts surging. While driving down the road its also bucking quite a bit. I hooked up my HPT and took a scan and the left bank at startup is only 500mV while the right is around 750mV. While driving, either of the two will randomly drop really low for just a second or two (about 30-100mV) then shoot back up to normal. I don't know what normal O2 sensor operation really looks like so can somebody advise me on what to do here or some troubleshooting steps I can take to fix this issue?

Swap O2's from left to right and see if the issue follows. If not, then check connectors and wiring to the sensors for an issue. If it follows the sensor swap you have your answer