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Buick LeSabre, Sedan
#1350 of 1520 1999 Buick LeSabre heater erratic display no heat
Dec 20, 2006 (7:57 am)
Hope I can get some help with this one. My 1999 LeSabre's all of a sudden is giving me a real erratic heater display. It's freezing and I got no heat. Thought it was maybe the thermostat so I changed it. NOPE.
What happens is I can get heat if I put the windshield defrosted on.,but when I switch it to mid level or lower level it turns cold. No the AC does not go on,just cold air comes in the car.Not heat.The display gets weird and says EXT. and changes the temperatue numbers every few seconds or minutes randomly.
Is this a control gone bad or some type of heating module?The display looks fine but reads like it is getting wrond info. Where do you think I should start?
#1351 of 1520 Re: 1999 Buick LeSabre heater erratic display no heat [mkuszek]
Dec 20, 2006 (5:39 pm)
Do you have the automatic dual air conditioner? If so I'd ask first if you have done anything around the wiring and vacuum tubing under the dash?
If you have the standard system I haven't worked with that one. I have had many wonderful hours of underdash time with my dual ACC and replacing the programmer when bypassing the vacuum tubes that control the doors.
The reason I suspect a ground is a defection head (control on the dash) shoud find an error and flash the numbers for about 90 seconds and then be stable. It sets a code that's readable with a scanner (Scan II) not the kind like Autozone has for the motor.
If not I'd suspect a defective dash unit or a grounding problem. Are you in a climate where there is lots of moisture getting into your car when you open the door and get in and out. A common ground problem to corrode is the one by the A pillar as it goes into the door sill. This can cause symptoms such as door locks not working, climate control changing, and other strange things I forget. One person had their car dying and he tried stomping next to the ground area in aggravation and it made contact again and started.
I had not dug into these on my own Lesabre 93 that developed symptoms-my wife made me trade it first.
I also understood there was one by the parking brake in the pillar area and one back next to the driver's seat. This picture looks like it's from wiring bundle somewhere in between. There also is a groundblock on the passenger side. But most people with problems find the moisture has corroded the copper in the buss bars on the driver's side.
My test would be some hammering on the wire bundles where there's lots of electrical tape wrapped around the ground busses to hope to make good contact again until the corrosion grows again. That could let you know it is a ground connection.
#1352 of 1520 Any suggestion for a used car
Dec 30, 2006 (8:34 am)
I would like to buy a used car - Buick LeSabre. The details are, 2003, with 85,000miles. It was once used for business purpose.
I am really a freshman in Buick even in car, could any kind people give me some suggestion for this car?
by the way, the price is asked 8500 dollar.
#1353 of 1520 95 Buick Lesabre climate control not responding properly
Jan 02, 2007 (6:17 pm)
Hopefully you can help! After starting the car the heater blend door behind the glove box moves fully in both directions (open & closed). When it stops it blows only cool air. If I turn the temperature to its hottest setting the blend door only moves a small amount. The only way to get hot air from any of the vents is to physically push the blend door linkage to the far right. Any ideas??
#1354 of 1520 Re: Any suggestion for a used car [leoli]
Jan 10, 2007 (8:46 am)
The only thing I'd be concerned is, check the maintenance records to make sure it was taken care of properly. In August of 2005 I bought a 2003 Lesabre that was a lease return and I was given all the maintenance records with it. I've put 20,000 miles on it and have not had any problems. I've been changing the oil and filter, of course.
#1355 of 1520 Steering pump whine
Jan 15, 2007 (7:02 pm)
Is there a cure for the power steering puump whine on a '95 LeSabre? I replaced thepump and it si still there.
Feb 04, 2007 (10:38 am)
Hey, ya'll have been a big help on previous problems, so maybe you can solve this one for me. My mom has a '99 LeSabre, with approx. 84K on it. I have noticed the E-brake light will sometimes come on even if the brakes are not touched. It seems to come on when I accelerate hard, and just then. The brakes will lock up on ice too. Has anyone else had this problem? I seem to think that it may be the ABS sensor going bad, but it's just a theory. Any help would be greatly appreciated.
BTW: The car has a waaaayyyy too floaty ride, can we change out the struts and springs to make it better? Would that help any? Thanks a million.
#1357 of 1520 Re: Problem w/ Brake light [94accord_lover]
Feb 04, 2007 (12:41 pm)
Without doing an research, I believe the ebrake light is also the fluid level for the master cylinder. It may mean the brake pads have worn enough and more fluid has gone into the wheel cylinders to lower the master cylinder level. In other words, have the front brakes checked. My rears have lasted 150K mi, so I doubt yours have worn. I think mine are about 2/3 still present on the back drums.
The ABS system should work or give you the warning light that there's something wrong. If you are going slow and try to lock up the wheels on ice they will lock up. The system doesn't seem to work below a certain speed.
The 84000 miles is about 35K miles late for strut replacement. I put Monroe Road Sensing struts, they had the air leveling on the rear since my Limited 98 has that. I just kept watching at Sears for what was their best sale on 1/2 price struts or full price with no installation charge. I forget which...
I don't like Sears since they ruined two studs and wouldn't replace the last one at their expense. It wasn't my fault they run the nuts off and on without cleaning the threads using their high speed air guns... to rotate and rebalance the tires taht are lifetime balance...
The struts will make a world of difference. You might do well with Delco replacements also. I had driven some loaner cars from my dealer that had repacement struts that I believe they put on. The dealer gives loaners for any service you have done and use cars off the used car lot, often ones with highermileage that tend not to sell. They had a 95 Park Ave that had 165K mi on it before they quit using it that had replacement struts that I thought were GM.
#1358 of 1520 1995 Lesabre Custom Dynoride
Feb 09, 2007 (2:26 pm)
I have a 95 Buick Lesabre with over 100,000 miles on it, and i think the transmission is slipping!
If I step on the gas to hard it will rev up as if it is in neutral. If i let up just a little off the gas, It will then go back into gear. This happens while in (OD) We replaced the modulator, and it seems to be a little better, But will still do it at around 50-60MPH. I have read in other forums that the modulator has to be adjusted, That there is a small screw that you turn clockwise, or counter clockwise. However i'm not able to find it!!! Anyone have any idea's???
Also Dose that stuff called "Transmatic" For automatic trans really work???
#1359 of 1520 Re: 1995 Lesabre Custom Dynoride [dee41]
Feb 09, 2007 (3:25 pm)
How many times has the drain, change filter, and refill maintenance been done on this transmission?
When the modulator was changed (external job?) was the oil drained and filter replaced?
My first thought would be a filter not letting fluid pass through it because it's partly stopped up.