I have a 2000 Buick Lesabre. Neither Keyless sender will work. I replaced the batteries and went through the reset by the book but nothing on either remote works. I don't even get a dash notice that the car is receiving.

I have to ask - since you didn't include any other info - do any lights work? If not - you may have a dead battery. You can attempt to jump the car or put a charger on the battery. Once started, you should drive the car w/ minimal accessories on (if jumped to start) to allow the battery to charge. You should have the batter checked for possible replacement or service very soon. Advanced Autoparts will do electrical system testing for free:


Store Services Advance Auto Parts

Could be the crank position sensor...nothing to do with the anti-theft...have you tried dis-connecting the battery for 15 minutes? This is designed to re-set to factory specs...

fuel level sender in fuel tank

No, the problem is with the fuel level sending unit in the gas tank. This is normally a substantial repair task. Fortunately, your sender is sold separate from the fuel pump and both are accessible from the trunk under the spare tire. The labor should only be a couple of hours. Please let me know if you have any questions.

1. Relieve the fuel system pressure.
   
2. Drain the fuel tank.
   
   

   Fig. The fuel pump service cover is located in the luggage compartment under the spare tire-Park Avenue shown; Bonneville and LeSabre similar
   

3. Remove or disconnect the following:
   CAUTION When removing the fuel sender from the tank, the reservoir bucket is full of fuel. Use caution in containing the fuel.
   
   NOTE Note the direction the strainer is pointing.
   
   
   Negative battery cable Spare tire and jack Trunk lining Fuel sender access panel Sender and quick connect fittings from the sender Electrical connector from the sender and position harness and hoses aside
   Sender retaining ring Sender and take note of its position Fuel sender O-ring and discard it

Check the temperature sender to the fans and the fan relays. Both are cheap to replace.

You either have a bad sender, poor connection, or a bad guage. Replace the sender first.

Battery is dead.

yes get your computer reset

they have had alot of problems with key switches in that model that is where i would start

My 2000 LeSabre Limited occasionally failed to start. Not a click, which was a tip off, disconncted the battery and cleaned all wires and posts at the starter and problem has not reappeared..