Top 10 2000 Buick LeSabre Questions & Answers

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Buick LeSabre Limited headlight switch

Buick LeSabre Limited headlight switch stuck in on

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It's so easy to solve this!

My stepfather gave me his 2000 Buick LeSabre and told me that the light switch was stuck. For weeks, I was driving around, frustrated because the battery would die if a valet attendant or parking lot attendant would inadvertently push the button in.

I thought it would be prohibitively expensive to fix the light switch. I was wrong.

I went online and searched for a new part, finding the switch for around $80. Once it arrived in mail, I was going to bring it to the shop to have a mechanic put it in. I then realized that when you open the driver side door, you can simply pull the decorative panel to the left of the steering column, from the left edge towards you, and it simply pops open. No screws, just pull.

Once you've done that, simply unscrew the part from the panel. Then pull the plug from the part and voila, you can simply replace it with the new one. Screw it back onto the panel, push the panel in and you're on your way.

$85 plus shipping later and you've solved one of life's great mysteries!

Here is the link to buy the part from Rock Auto:

2000 BUICK LESABRE CUSTOM 3.8L 231cid V6 FI (K) : Electrical-Switch & Relay : Headlight Switch

Rock Auto Parts: http://tinyurl.com/cf88f2

Posted on Feb 21, 2009

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where is the O2 sensor located

where is the O2 sensor located

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For 2000 Buick Lesabre 3.8L SFI OHV 6cyl the Oxygen Sensor is located: under hood, center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold.

zjlimited_1375.jpg

Fig. HO2S1 location "2" on 3.8L


zjlimited_1376.jpg



Fig. HO2S2 location "4" on 3.8L




Hope this helps (remember to rate and comment this answer).

Posted on Jun 07, 2011

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my car starts rite up then dies after a few minutes.and i just changed my fuel pump and filter and relay and its still doing it what is the problem?

my car starts rite up then dies after a few minutes.and i just changed my fuel pump and filter and relay and its still doing it what is the problem?

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I cannot tell you what is wrong without diagnosing the problem. However, I can do this:

Let me give you a little "Automotive Technology 101". The first thing you need to do is to check what is missing when the engine dies. A gasoline powered, internal combustion piston engine needs 4 basic things to make it run:

1. Volumetric Efficiency (built into the design of the engine)
2. Air-Fuel Ratio
3. Compression
4. Ignition

Running out and replacing parts without first determining which of these things are missing from the equation is usually a waste of time and money.....your post bears witness to this statement.

The engine will not run at all if there is a serious problem with Volumetric Efficiency, and it takes an engineer to design and fix that anyway. It is not likely to be a compression problem if it starts and runs ok before it dies. So that leaves us with spark and air-fuel ratio.

So the next question is whether it is fuel or spark or BOTH at the same time? There are several things that can possibly affect each of these. Several possibilities can be either verified or eliminated by answering this simple question.

It is important to realize that BOTH of these things (spark and fuel) are controlled by your onboard engine control computer. To attempt to diagnose these things while ignoring the computer that controls them is usually a real EXPENSIVE way to perform this task.

With all that said,
What you need to do is check your fuel system and your ignition system when the engine dies. If the engine does not start right back up after stalling, it makes things a little easier because some "manual" testing can be used to verify a few things.

Check to see if there is spark at the spark plugs. Check to see if there is (A) fuel pressure at the fuel rails and (B) injector pulse at the injectors. This will tell you if it is a fuel "delivery" problem (fuel pump, relay, fuel filter, etc.) or a fuel "injection" problem (computer inputs, injectors, injector circuits, etc.) or if the ignition system is malfunctioning (coils, wires, computer, electrical connectors, security system, etc.).

From the sysmptoms you are describing, it sounds to me like if you were to actually check these things like they SHOULD be checked, you will most likely find that the fuel pressure is within specifications and that you have no injector pulse or spark at the spark plugs.

If this is what you find, then the "most likely" cause of your problem would be a failed crankshaft position sensor, because this will affect BOTH the spark and the injector pulse at the same time.

Proper diagnosis recommended.

Posted on May 07, 2012

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2000 buick firing order 3800 motor

2000 buick firing order 3800 motor

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Here is the firing order diagram for that vehicle and engine.




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Posted on Aug 06, 2010

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Random Cylinder Misfire

I have a 2000 Buick LaSabre that suddenly started not running well.  The Service Engine Soon light often starts blinking, and stays steadily on at other times.  I went to AutoZone and they read the trouble codes that say that the system is detecting "random cylinder misfires".
The thing is that just a month or two ago I was having similar engine trouble, though the diagnostic then was stating that a specific cylinder was misfiring.  I changed all the spark-plugs, since my mileage is over 100,000.  However all the old plugs looked really good.  Unfortunately, the problem persisted, so I changed the wires.  Then the problem was solved.  (I did find that the coil connector side of the wire for the diagnosed misfiring cylinder was charred.  So I'm sure that was the real problem.  Though I have concern over what damage may have been inflicted upon the coil and/or the Ignition Control Module.)
So I know that my spark-plugs are new, and so are my wires.  What would help me in further diagnosing this issue would be to know how the system determines misfires, and whether it would report a "random" cylinder misfire if a pair of cylinders were misfiring---specifically if the pair of cylinders driven by a single coil (of the three on this vehicle) were misfiring?
Does the system determine such misfires through a detection of the ignition impulse sent to the spark-plug (back EMF, current, etc.), or does it have some ignition sensor within the cylinder (detecting light, heat, sound, whatever)?  The answer to this question will help direct my diagnosis.
If the system does not have the ability to identify a pair of misfiring cylinders, but will provide the "random" misfire code even for a pair of misfiring cylinders driven by the same ignition coil, then I could rightly suspect a coil.  Otherwise, I don't suspect a coil since this would require multiple coils to be acting up.  (Not impossible, but not so likely.)
The thing is that the sound of the engine doesn't suggest "random" misfires.  It sounds quite regular, even though the gas mileage I'm getting suggests I'm running on only four of my six cylinders.
Please help.
Thanks.
David

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The problem is the ignition control module such is under the coil packs. It seems to be an internal problem in the design. I have seen it many times and if you don't belive as many will not. So disconnect the modules electrical connector and just let it sit for two to three days. After that clean ir replace your sparkplugs, they will be fails up dew to it running lean and rich. Plug it in. Plug it in and wala its fixed $ but only for a week or two then back to the same thing so in short change the ignition module and save time and money, and don't forget to thank your friendly neighbor hood mexican mechanic.

Posted on Sep 10, 2011

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2000 buick LeSabre 3800 serpentine belt diagram

2000 buick LeSabre 3800
serpentine belt diagram

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Ok sent you a diagram of the belt I hope to serve you Thanks and good luck90dd5bb.jpg

Posted on Jan 17, 2010

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under hood fuse box diagram 2000 Buick lesabre

under hood fuse box diagram 2000 Buick lesabre

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ironfist109_433.jpg


  • Hope this helps.
Regards, Tony

Posted on Oct 28, 2011

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At 40 mph the car starts to shake. It last to 5o

At 40 mph the car starts to shake. It last to 50 mph and smooths out and driver fine. the shaking seems to be worse when I accelerate. But does not seem to come through the steering column.
thanks for any help you can give. Eddie

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I have this same car with exactly the same problem. Begins shaking at 40mph and stops shaking as soon as you let off the gas, but then begins again as soon as you press on the gas and smooths out as you get over 50. And the shaking is not felt through the steering wheel. Solution: Replace the transmission mounts. There are two of them, one on each side mounted on the frame right next to the shock strut. There is also a front and rear engine mount, but I replaced the two as described and shaking is gone.

Posted on Dec 13, 2009

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where is the oil pressure sending unit located?

where is the oil pressure sending unit on a 2000 buick leSabre

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The pressure sending unit is located on the passenger side rear of the engine just above and slightly to the left of the filter and filter housing.

Posted on Aug 01, 2009

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2000 Buick Lesabre a/c system

2000 Buick Lesabre a/c system problem. Blows hot air. Compressor working ... 27 psi low side, around 185 psi or so high side. Blower is blowing hot air. Is there a vacuum line I need to check? A pneumatic valve underneath the dash somewhere? Oh, I also took the cabin air filter out and checked ... no change in air temperature. Also, I'm having trouble locating the manifold vacuum source. Would welcome any advice you might have. Thanks in advance.

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  1. This problem is caused by the failure of a part called the "Air Temperature Control Electric Blend Door Actuator". In order to remove and replace this part requires the entire dash assembly be removed from the car. This model has not used vacuum controlled blend door actuators for many years now. You will need a high degree of auto repair skill and a factory repair manual is not an option, without one you will maybe get it apart but you may do more damage trying to get it back together. You can gain access to all the factory either by subscription or at the web link below for used ones.
http://www.faxonautoliterature.com/Search.aspx?c=137965 Used manual set.

www.alldatadiy.com download

Posted on Aug 05, 2011

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