Cannot send MapQuest directions using OnStar

Am I the only one having issues with sending map route directions to my Onstar Turn By Turn Nav?
I have contacted MapQuest, and they say that it’s an Onstar issue, and Google maps doesn’t support Onstar either!.
I have contacted Onstar and they say that it’s a MapQuest issue.
I like to see the route, first, before it is sent to my vehicle.
The app that is recommended doesn’t let me do that. The new MapQuest site does not have the SEND option on it and you can’t use the classic MapQuest to do that.
Onstar and MapQuest seem to not be talking to each other.
If I am the only one with issues, I will not pursue it any further.