Also, 540 CBEF didn't sign on until 1970.
630 CFCO Chatham and 1070 CHOK Sarnia were two other CBC affiliates that could be picked up (and still can be) in much of the Detroit metro. Both disaffiliated in the late '70s or thereabouts and were replaced by CBC O&O FM rebroadcasters of 1550 CBE (which still exist as rebroadcasters of 97.5 CBEW-FM).
700 WLW of course was NBC for a good chunk of Ohio, Indiana and Kentucky. I've also heard they ran ABC's "News at :55" at the bottom of the hour.
West Michigan had 1300 WOOD as NBC and John Fetzer stations 590 WKZO (Kalamazoo) and 1230 WJEF (Grand Rapids) as CBS. After the ABC split in '68, 1340 WLAV was American Contemporary, 810 WJPW (in Rockford, a small town not far north of Grand Rapids) was American Entertainment, and 96.9 WLAV-FM was American FM.
Lansing, like Flint, Ann Arbor and Toledo, got CBS via WJR, but 1240 WJIM was NBC. After the ABC split, 730/94.9 WVIC got the American Information network and 99.1 WSWM (which would shortly change its call letters to WFMK) took American FM. I assume WVIC must have switched to the Contemporary network very shortly afterward, because they were one of the first American Top 40 affiliate stations in 1970-71, but if I'm not mistaken they still had an MOR format in 1968-69.
WLEN 103.9 Adrian, MI was Mutual back then. They're ABC now, but they were affiliated with NBC until their radio network shut down.
In Michigan's Thumb, 660 WMIC/97.7 WTGV in Sandusky are ABC and have been with the Information network as long as I can remember.