The claim about it plugging right in was false.
The Camaro appears to have a unique wiring harness for the OnStar mirror. The 50-GENK6 mirror will not connect to the Camaro mirror harness without some sort of adapter.
I've sent an email to the selling company to see if they have any way to make this work, otherwise I'll have to return it.
12 Charger SRT8 | 04 Chevy SSR | 04 Ford Thunderbird PCR #428 | 06 Toyota Highlander Hybrid