I have a 1995 Buick Lesabre. The car just stops running (stahls) for no apparent reeason. I have changed the battery and the alternator and it still has the problem? Sometimes the battery light will come on for a second or two then goes off and occasionally the service light comes on. It sometimes happens when the car has run for a few seconds and other times when it is fine for hrs? After a few seconds I can restart the car and it runs fine.

SOURCE: Blows no heat 1995 Buick Custom LeSabre

change the thermostat

SOURCE: transmission plugs different

Not if one is a 4t60e and the other is a 4t65e, they are not interchangable. The 1995 should be a 4t60e, It has a round plug toward the radiator and also has a vac modulator. The 2000 should be a 4t65e, It has a bigger round plug coming through the top of the side cover, toward drivers fender, and no vac modulator.

SOURCE: 1995 Buick LeSabre cooling fans not working

check the fan relay swich or the fuse

SOURCE: 1995 Buick LeSabre - Stalls then restarts while driving

Has the fuel filter been chg. lately. If it has, maybe a fuel pressure test is in order. Fuel pump might be geeting weak and does not show up until it gets warmed up. Fuel pumps are a common problem on this type of cars.

SOURCE: 1995 buick lesabre cutting off

i have a 1995 buick lasaber that was doing the same thing. we replaced everything that we could think of, including the things that are mentioned here. i took it to the buick dealership and they finally were able to find out that it was faulty wiring that connects to the crank shaft censor. they said it is a fairly common problem that is misdiagnosed all the time. hope this helps.