good luck with sale -- I had the exact same charger left over from my 2017 Volt -- got totaled from red light runnner, and it was in my garage, insurance never asked or cared about it lol
Just an FYI - I threw it on ebay for a buy it now of $199 and it sold very fast about a month ago, they are technically capable of 240V charging if you know what you are doing. Apparently a car dealership bought mine to complete a Volt they took in on trade or something.