We had my late mother's 98 LeSabre around here for awhile, while researching a charging issue and a few other items before sale. We called it 'the couch' due to its door-to-door bench-like seat, and its decidedly non-euro ride. (Other cars in the stable have much tighter ride characteristics: Volvo, Mini, BMW...)
She had a 97 for awhile, but it gave its life for hers in an accident on the highway. Turns out a LeSabre is a pretty safe car, even at 70 mph upside down being pushed by a truck. She came out pretty well, and the car was driveable (though smushed) afterward. Good enough result for her to get another.
That vintage pre-dated the timing chain issues that may crop up on the OP's vehicle (or may have been settled by then, too...) but the 98 had a headlight high-beam switch that was a real bear. Totally unavailable, even though many parts outlets noted it was "in stock". This car had the compact tilt steering column, with no "box" on the top. Ended up pulling the guts out and gluing a spacer to take up wear in the high-beam switch mechanism.
The other goofy design issue was in the positive battery cable. It is a two-wire affair, each heading to different destinations. The terminal had two stacked ring contacts, both encapsulated in the same rubber insulation. The upshot is, while the rubber keeps it clean for awhile, they eventually corrode, and the rubber keeps you from getting to the space between the stacked ring terminals. So, the battery-to-starter cable works fine, but the battery-to-alternator cable doesn't, and you are left with a dead battery. Or vise-versa. Plus the general badness of side-terminal batteries. Removal of the rubber jacket and thorough cleaning put the matter to rest, with reliable starting as the result.
Quite a bit of work, but worth it when we got asking price for the car. And hers was completely rust-free. Remarkable for an Ohio car with 100k on the clock.
Chip