Hey Phill=the front ones can be gotten to from the rear of the light assy and on some of the cars you can get to the rear ones in the trunk. GoodluckJoe
It is quite simple to replace the turn signal switch on your 1990 Buick LeSabre. The turn signal switch simply plugs in and out.
There is a very good step-by-step at this site: http://tss.likeabigdog.com/
Replace axle on 2001 buick Lesabre
Where is the a Alternator located on 1999 buick lesabre
how do you replace the fuel pump on a 1997 buick lesabre
How do you replace the front turn signal bulb located on a 2001 Buick Century?"
where do the thermostat go in my 93 buick lesabre
Where is the thermostat located on a 1987 Buick LeSabre?
where is the engine controle module located in a 1995 buick lesabre
replace the combination switch on the turn signal stalk
Bulbs or turn signal flasher, maybe even the switch.
How do I replace heater core on 98 Buick lesabre