I plugged in Garmin US ALL and Canadian West Coast G2 found in handhelds section after choosing model your using and then following Garmin's path. Lake Huron comes thru in detail.
There are seperate Lakes charts each on its own card but I understand this to be motorboat Garmin.
Problem is G2 doesn't cover land so you could use Streets and Trips for land mapping. I have Mapsource with former west coast Blue charts and then Nroute uses satellite GPS for on map road running