Last post on Dec 14, 2011 at 11:48 AM
You are in the Buick LeSabre
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Buick LeSabre, Sedan
#1462 of 1520 Re: 2003 Buick LeSabre Limited AC [julie23]
Aug 07, 2008 (9:13 am)
When its blowing hot, you should see that the AC compressor is not turning.
I think its the high pressure AC sensor.
When its not working, try taping/hitting the switch (ask some mechanic to show you where it is, should be on the AC high pressure line near the compressor). If the compressor comes on, then it the switch.
The switch is about $70 from dealer and should not be that hard to install. Should not have to drain the freon to change switch.
This switch is a problem with many GM cars.
#1463 of 1520 Re: 05 LeSabre Gas Cap loose code [mariannesam]
Aug 07, 2008 (12:27 pm)
I've got the extended warranty, but if it is not covered under the warranty, I'd be looking at an expensive diagnostic testing. Received a tip on another forum and it seems to have fixed the problem. I was told to check the filler neck lip where it touches the gas cap and clean any build-up of rust or dirt off it. Found quite a build-up along the upper portion of the filler neck. Took a green scrubbing pad and with a little elbow grease and some 409, I was able to clean it back down to the metal. Put the gas cap back on and started the car and let it run. After about 5 minutes the error code went away and the Service Engine Soon light went off and has not returned. I'm keeping my fingers crossed. (It seems that Firestone uses a different kind of cap that expands out inside the neck, by-passing the filler neck lip.)
Sep 09, 2008 (8:14 am)
my 1998 lesabre parked in garage key off suddenly horn blowing this is fifth time this happened also happened when parked out side obviously neighbors not happy any one know how or why this is ana how to correct it ? thanks foe any help
#1465 of 1520 Re: horn malfuntion [icnfixxit1]
Sep 09, 2008 (12:34 pm)
Is it blowing in the on-off pattern of the security alarm or is it continuous?
#1466 of 1520 '90 Buick LeSabre stalls when lukewarm.
Sep 24, 2008 (11:36 am)
My 1990 Buick LeSabre, which I have cared for very carefully for lo these many years and which has consequently been running well, barring the occasional but minor glitch, has not been feeling well of late. About 15 to 20 minutes after I start it up from the cold-engine state, it stalls, sometimes hesitating before doing so, or sometimes just cutting out completely. Then, sometimes but not always, after I restart it, it will re-stall within 5 to 10 minutes. After that, it runs fine, at least until the next morning when I again start it up from its cold-engine state. Some days, however, it doesn’t stall at all. The EGR valve was replaced and the problem persisted. The air-intake system was fixed, at least according to my mechanic, and the problem persists. I would like to hear from a Columbo of automotive mechanics, someone who can help me avoid having to blow more money on ineffective solutions, please.
#1467 of 1520 Re: horn malfuntion [icnfixxit1]
Sep 25, 2008 (6:11 am)
If the horn stays on continuously, then it is likely an issue with the switch that is in the steering wheel above the airbag unit. This is a major design blunder on GM's part. The switch was VERY poorly designed and expands upon getting hot. Usually this happens when the car is sitting out in the sun, but can happen anytime.
You have a couple of options you can try:
1) You can take the air bag unit off of the steering when and disable one of the horn switches. Test to see which one is causing the problems with a volt meter. To take the air bag unit off you'll have to disconnect the negative battery terminal. Then pull the airbag fuses out of the fuse panel below the driver's side dash. Pull the kick panel off of the drivers side and disconnect the yellow connector (to completely disable the airbag). Use a torx bix to loosen the screws on the back side of the steering wheel. This will release the air bag unit. Once you pull this off, you'll see another yellow connector and and a black connector for you radio controls. There will also be a spring type clip that goes into one of the holes and a longer plastic tube with a spring attached that goes into another hole. If you put a volt meter on these two connections you can test the switches. Once you've found the switch that has a problem just leave that one disconnected. There are two small black plugs. Usually, one of the switches is more sensitive than the other and you can just disable that switch. The horn will only work when you push the steering wheel in the specific location of the switch you did not disable.
2) You can buy a new airbag unit which will obviously have a new horn switch that should not have problems for the next 5 years.
#1468 of 1520 Re: '90 Buick LeSabre stalls when lukewarm. [ubisum]
Sep 25, 2008 (9:53 am)
It sounds like it may be a problem I had a while back with my 88 Chevy van. There is a coil that comes off the crank shaft that sends a signal to the CPU and tells it to send spark when the crank shaft is spinning. The coil on my van went bad, but it was ok while the engine was cold. After 10-20 minutes when the engine was hot the engine would just quit. It would only restart after sitting for an hour or so. I replaced the coil and it ran perfectly again. Check to see if this is a possibility. If your 90 lesabre has a similar coil, then this could definitely be your problem.
#1469 of 1520 Re: '90 Buick LeSabre stalls when lukewarm. [ubisum]
Sep 25, 2008 (12:36 pm)
It needs some diagnosis to try to eliminate some of the potential causes.
Fuel pressure from the 18 year old fuel pump?
Connection problem at the electronic spark control under the coils?
Crankshaft position sensor?
Camshaft position sensor? (I think this one gives code)
This car really needs to be hooked up to a Tech II or better device while being started and running to see record what happens when it acts up. It sounds like it's doing it regularly and somewhat predictably.
Are there any codes when read by a code reader at Advance Auto or Autozone.
#1470 of 1520 Re: '90 Buick LeSabre stalls when lukewarm. [imidazol97]
Sep 26, 2008 (10:50 am)
Keith aka imidazol97 : Thank you for your most relevant response. Every bit of knowledge that allays my ignorance on this matter is most appreciated. The way I figure it, this is a problem that my mechanic, who’s been in the business for about twenty years, has never encountered before. Apparently the combination of a truly knowledgeable mechanic and a really honest one is impossible to find, at least for me. All too many of them tend to see a customer’s automotive ignorance as an opportunity for profit.
#1471 of 1520 Security Alarm malfunction
Nov 03, 2008 (7:25 am)
The alarm horn and lights will go off on my 1998 randomly and frequently even if the car is not locked. I have tried various methods of locking the car with and without remote, manual and nothing seems to work. Is there any way to deactivate the system? I can't find a seperate fuze. Sometimes the security light on the dash board will be on but most of the times it is not on.
Thanks for any help