This forum seems to provide an answer: http://forums.xfinity.com/t5/Channels-and-Programming/what-happened-to-GRIT-TV-on-Comcast-March-2017...
Seems the local channel, WUTB may have dropped it. It is operated by Sinclair Broadcast Group, which was mentioned in one of the replies as replacing Grit with Charge!. I wish we still had it though, I really liked it.
If someone knows of a way to still access it I would appreciate any suggestions.
Contracts are being renegotiated, and some spinnoffs may go to tv cemetery. It's sad because we really enjoy the Grit channel as well.
Hi Krisdish, you can submit a Customer Feedback Form. Your suggestions help us to reevaluate our channel lineups as well as our overall content delivery, allowing us to create the best customer experience possible.