when there isn't enough spark going to the sparkplugs, and your car is not starting. sometimes it occurs most in winter because of the temp.
How to change brake lines on a 1991 Buick Lesabre?
Instructions for replacing radiator on 2000 Buick Lesabre custom
Should have an access panel inside trunk
Cost on replacing ball joints on a 2001 Buick lesabre
The thermostat on a 1992 LeSabre should be inside of the top radiator hose inlet. You can easily change it by removing the top hose and water inlet.
This varies with model year.
replace starter
change sparkplugs on 2003 Rendezvous
Because its a 1988 Buick LeSabre
Where is the thermostat located on a 1987 Buick LeSabre?
where is the ecm on a 2000 buick lesabre
33 psi