Stop in for a cup of coffee

ZMan67S said
Knowing little to nothing about Buick's I think your model is a high end car so might of came with seat belts.
A quick search showed 1965 Le Sabre's with front only seat belts as standard.

Cool! I'm gonna get them. I've been driving the car farther and longer now and it kinda makes me nervous not having a seat belt on.