Car Batteries
Buick LeSabre

Why might the battery on a 2000 Buick LeSabre go dead overnight a few times a year?


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2011-09-13 16:05:39
2011-09-13 16:05:39

I am having a similar problem with my 99 Regal LS. Sometimes my wife drives my car to work, a couple of times when she was ready to drive home the battery was completely dead! Needless to say she wasn't pleased! I had to come and remove the battery, take it to nearest auto parts store for a quick charge then reinstall the battery. At first I thought this might be caused by the door lights, However, It was odd I never had this problem when I drove the car. I will elaborate more on this point in a minute. I started doing some research and found some helpful info on another automotive forum message board. Key items I searched for on the other message board are "battery rundown protection" and "retained accessory power". I found someone with a 98 Pontiac that was having a dead battery problem. It turns out an amplfier in the stock stereo system was staying on causing a parasitic drain on the battery. This could be relevant to my situation because my wife listens to radio going to work and has a habit of not turning it off. She uses the auto cutoff feature that cuts it off when you open the car door. Let me know if any of this sounds relevant in your situation. It is always difficult to diagnose extremely intermittent problems.


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One of the main causes for a 1998 Buick LeSabre to die while driving is a problem with the computer. The computer might tell the fuel pump to shut off and stop sending fuel to the motor.

I would call your local Buick dealership. Ask for the service department. Be straightforward and tell them that you need the radio code for a 97 Lesabre have the VIN # on hand and they should give you the code. Some dealerships will only release these over the phone to other dealers so you might want to tell a little white lie that you work for another dealership.

Check or another such sight They might have a picture. They did for the same part for my 91 lesabre. (Which may very well be the exact same part)

It stands for Inflatable Restraint sensor might be faulty

you might need a good battery

There might be a picture of this under the hood. Alot of GM's have this. It is possible that the engine mount will have to be removed for this depending on what engine you have .

Check the belts. The most common cause of squealing is a worn or loose belt on the front of the engine.

A 2000 Lesabre is not designed for E85. While the car might operate on E85 the fuel system is not built for it.

Will any light come on when it's messing up? If not, you might have a problem with the ignition lock cylinder (where the key goes) or the ignition switch (the electrical part inside the steering wheel). Good Luck!!

is the battery dead? you might need a new starter that should be around 200 dollars.

I don't know the answer, but I wanted to comment for those that might not know, this is a side post battery (I assume... I have a '94 which is a side post)

Most likely there is something that is draining it. In case it might be the battery itself, disconnect the battery terminals at night. When you reconnect in the morning and the battery is OK, then the problem is in the electrical system somewhere. If the battery is dead then the battery needs to be replaced. Finding the fault in the electrical system can be difficult. Check to make sure all lights go out when the car is turned off. Pulling fuses to see if any stops the drain could help isolate the problem too. Good luck

It's underneath the coils. This link might help.

When it will not hold a charge nor take a charge it is defective. Of course something might be on pulling power from the battery. Any light or stuck relay. Disconnect the negative battery cable, charge the battery with a battery charger and let it sit overnight. The next day if the battery is still charged it is ok and you have something pulling power from the battery. If it ran down the battery has a dead cell and is defective.

Possibly worn CVC joint. Have the CVC joints inspected. It might be that your motor mounts are broked and the motor is lifting up and slaming back on the chasey

If it will not hold a charge it has a dead cell and must be replaced. If it is just running down overnight disconnect the ground cable in the evening to make sure something is not on pulling power from the battery.

Check the flasher as it may be malfunctioning also check for another burnt out bulb or loose connection or your bulb holder might be dirty and not making a good connection.

Remove the serpentine belt take out the bolts that hold the alternator to the engine disconnect the wires from the alternator Yes, but first step: remove the negative battery cable from the battery. You might get some fireworks otherwise.

it might be your a/c heater blend door actuator is bad and not closing when the heat is or you need to bleed your system

If you're sure the battery is ok (sometimes they can short out and draw down the charge) you might want to test the alternator to see if it has bad diodes.

The battery might be bad or the charging system might be not good or the batteries life might expired.

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