Wideband o2 wiring

Do you ground to the frame or battery on that 5th gen camaro for the wideband o2 sensor?

I'll assume you're referring to the ZL1 Camaro we had an Innovate LM2 installed on? If so then the LM2 was powered via the accessory power outlet (and hence grounded through this too). It results in a significant ground offset though and to help reduce this we run a separate ground wire to the battery negative. This still doesn't completely eliminate the ground offset so some work is necessary on the calibration in the VCM Scanner to get it reading accurately. This is why I now bring in the LM2 data directly to the scanner via serial.