I would be inclined to check the engine to earth strap and battery earth as first before checking wires to alternator and starter motor.
SOURCE: Replace Cruise Control Switch in Steering Wheel
I am describing the procedure for the "On/Off" switch, I did not try the one you mention. Buy the switch anywhere ( about $15 ), then use a sharp tool ( small knife, screwdriver, anything ) to gently pry the old one from its socket. It is not glued or screwed in or anything, just squeezed tightly in the socket. Once the switch is out, pull the cable, connect it to the new one, insert back in the socket and press gently. No force necessary, it comes out easily.
SOURCE: 2000 buick lesabre stall after starting or after running for 30 minutes
I have a 1996 Lesabre. I had a similar problem that slowly got worse. I brought it to two different mechanics that did diagnostic checks and could only "suggest" what to replace to fix the problem. Their problem was that it wouldnt stall out while they had the mv. After replacing a bunch of sensors and the fuel pump/ filter, I solved the problem by replacing the Crank Sensor. Its located behind the lower crank pulley on the 3.8 lt motor. Hope this helps!
SOURCE: 2001 buick LeSabre cruise control
no not a fuse may be the switch itself this is common and parts are not badly priced. replace the switch. It just pops out. The directions will tell you to take out the airbag first but it will sneek out of there.
SOURCE: Rear brakes need ajustment on Buick Lesabre
I don't know if this works on a Buick but I have had two cars that the auto adjusters worked when you used the parking brake, I rarely use the parking brake so I got in the habit of working the parking brake 20 times or so at oil change time.
SOURCE: Fuel relay placement 1991 Buick LeSabre. Replaced pump & filter still won't start
Your vehicle's fuel pump relay is located on the relay center, behind the glove box, 2nd column of relays, 2nd one from the top.
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