I have attended 3 Lions games on Thanksgiving:

1969, MIN 27 DET 0
in the snow at Tiger Stadium
--- Joe Kapp led the way for MIN

1971, DET 32 KC 21
KC was the defending champs
--- KCs TE Morris Stroud stood 6-10

1988, MIN 23 DET 0
Lions first 1st down came near halftime
--- a 4 pt gain in 19 years