Only if there the same size and the hookups are the same, trany lines, oil lines, radiator hoses, and temperature sending units ports.
unlikely a direct fit.....the LeSabre had a 3800 v6 and the Lumina had a 3.1 or 3.4 but not a 3800, so the hose size and location most likely are different. The Monte Carlo, Cutlass, and Grand Prix will have the same radiator.
Search Buick LeSabre Questions
Buick LeSabre Experts
Related Models For Sale
Used Cars For Sale