Buick cloth
I used to have a Buick Regal coupe that had the same cloth interior that was was on the LeSabre Custom. Even though it can't reach every spot on the surface, the Electrolux Sidekick was my preferred tool. You'll need a crevice tool, too, but the Sidekick will keep the accessible areas clean without damaging the cloth. When that car was made, I believe it was the best-selling domestic full-sized car - for good reason. The early '90s saw some really beautiful Buicks.