Buick vehicles do not have inertia/reset switches.
code 26 buick 1990 lasabre limited
Located on top of the starter
under the rear seat.
Fuel pump is located in the gas tank.
it should be behind the Harmonic Blance,right top
location of the heating thermostat for the 99 Buick lasabre
Check the bulbs Check the stop light switch
FUEL FILTER ON 1988 BUICK LASABRE IS LOCATED DRIVERS SIDE IN FRONT ON REAR WHEEL ALONG FRAME.
in the oil
May have a switch going out in doorjambs-check their operation.