Engine will not start

I would first see if it stored any codes in the computer.(CODE SCAN)Depending on what code it threw out, it can tell you what to look at next(short cut)Pull A Spark Plug Out, Does not Matter Which One. Put Plug wire back on spark plug, touch threaded part of Spark plug to head or metal bracket, hold with rubber insulated pliers, have someone turn engine over and watch for a spark at tip of spark plug. If there is spark, you just ruled out fire, now on to the fuel. You will need a fuel pressure tester to test the fuel pressure at the fuel pressure regulator (Rent at Advance Auto I Think)Check your Specifications in a chiltons manual for correct fuel pressure at regulator. If no Pressure or LOW pressure I Would probably look at the fuel pump (1st Check Fuse or relay). I would say check fuel filter but never in my 27 yrs. Wrench turning have I ran across one so bad it would not start.

In case you have tried everything else:

I have a 2000 Buick Le Sabre. I replaced alternator and pulled some fuses and engine would crank, and occasionally start for a revolution or two, but that was it. No start. No code thrown. Security light not flashing.

Checked fuel pressure its okay!

This guide will help you

https://www.2carpros.com/articles/car-cranks-but-wont-start

Then I noticed the two of the three screws in the forward fuse holder were loose. I tightened those and instant start. The screws secure the big connectors below. When the screws loosened, pulling a fuse was just enough for connectors below to loose contact. Still no start, Then I replaced the crankshaft sensor and BAM! the engine started.

Thanks 2Carpros

Other Category problem
2000 Buick Lesabre Engine Size unknown Wheel Drive Type unknown Automatic 116000 miles

For a while the service engine light has been on. I was planning on taking it into the shop this next week to have it checked out. Last Monday, the car wouldn't start. I jiggled the thing (maybe it's called the ignition switch) where you put the key in and it finally started. Worked fine for 5 days and then the same problem happened yesterday, but won't start even when I jiggle the switch. I tried to jump start it from another vehicle, but nothing happens. The lights, horn, radio seem to be working fine. Do you have any idea what the problem could be?

Electrical problem
2000 Buick Lesabre 6 cyl Front Wheel Drive Automatic

My car wouldn't start the other day, and every time I try to start it the lights would come on but the engine wont turn over, the relays click but the enigine wont start

Engine cranks but no spark, no injector pulse, no rpm. Fuel pressure is about 48lbs

First for about 6 weeks, my 2000 lesabre would stall and then in about 0 to 5 minutes, it would start back up. It would only do this once per trip. After it stalled and started back up it would run fine until the engine was turned off and then it would stall again during the next trip.
Now the engine would hardly turn over. Tried again and it started. Drove for about 10 minutes and stopped. It started again and the engine had a light grinding noise (like an alternater grinding) for about 5 minutes and then it stalled. After the engine was turned off some motor was running under the engine towards the front of the car. It was smoking and finally stopped running.

The car wont start after setting a couple of days Acts like the battery is low. Had the elect. System and battery checked out and they could find no problem. Said the problem may be I dont drive enough to keep it charged. So I tried starting it every other day and I still have the problem.
It does nothing at all and will not crank untill jumped then starts normally

Engine Performance problem
2000 Buick Lesabre 6 cyl Front Wheel Drive Automatic

the car has been running fine but was started and all of the sudden started to run rough. It was shut off and would not start back. What was thought to be smoke was noticed in the engine comparment. I checked to see if the engine was getting fuel and the pressure was 60 psi at the manifold. I removed a plug to check for fire. There was none (i don't think I had it grounded good) so I removed the ingnition module. It tested bad at the parts store so I replaced. The engine would still turn over but would not even try to start. I took the new module back to the parts store (just in case) it tested good. Still believing I was not getting fire I replaced the crank shaft sensor. Still have the same problem. I removed a plug again and found that the plugs were firing. I checked them all. I then thought that it had jumped time, since it had 200,000 miles on it. I tore it down and guess what that was not it. I replaced it anyway. While I was at it I replaced the camshaft sensor. Still had the same thing. Oh, I forgot to mention that I used a scanner and no code was shown. I installed new plugs and plug wires. Plus I had all the coils checked. I had the batt checked, cleaned cables, checked fuses and relays and nothing found. Then today I took the catalytic converter lose and cranked the engine. I heard a sound which sounded like a backfire which I heard one time before, during this whole process. This time I saw what seemed like smoke in the engine comparment but I couldn't smell anything. The smoke all most seemed like a mist. The battery was going down so I put everything back together and went home with my tail between my legs. My dad (who the car belongs to) put a charger on the battery. Two hours later he calls me and tells me the car started. He cranked it with the pedal to the floor and it started. The car ran fine for a minute and then seem to start to surge. It choked down a quit. It started back and did about the same thing, it would only stay running if we kept giving it gas. I pulled a plug which kind of looked strange. While the car was running there was white smoke coming from the tailpipe. I'm wondering now if the problem may be with the intake or a head gasket? There is no water in the oil. Please help

My 2000 lesabre doesn't start. The starter turns but it won't turn over and start. What could the problem be?

Car runs and starts great. When I drive for 20 + miles, turn car off for a few minutes, ie to run into a store, come back out, car idles low/ rough for a minute or so then dies. Then car won't start for at least 1 hour or more. Car cranks, but wont turn over. When car has time to cool off, so to speak, it start up with no problem. It is not showing any codes. Volt meter reads 14.6 and thermostat is not running hot. Any ideas?

2000 Buick LeSabre Limited electrical problem

This is an intermittent problem which occurs when vehicle is in motion or idling while parked.

The warning lights come on, the fuel gauge falls to empty, the radio goes off. The DIC mileage information lights go from numerals to dashes.
Also, the air conditioning stops cooling.

When parked and put in park the doors will not unlock and the keyless entry fobs will not unlock the doors or the trunk.

During this condition, the car will not start or even make a sound as if it were getting power to the starter.

The battery is good and I have cleaned the terminals good including the ones under the hood.

While idling during this condition, I can slam the trunk or a door and all will return to normal-some of the time.

The condition does not affect the driving of the car.

I think this could be the body control module(?) What do you think? Is this located under rear window deck?