Question about 1991 Buick LeSabre

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Where is the heater core located in a 1991 Buick Lesabre? \

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Behind the glove box. It will come out under the glove box. It takes longer to get the hoses off then it does to get the core out. I can do one in thirty minutes.

Posted on Oct 24, 2010


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I just put a bypass hose on my 91 Buick lasbre and turn on the heat and started seeing steam come out the vents and now its steam on my windshield

Sounds like you have a bad heater core or you have antifreeze leaking in the into the heater box. Maybe a loose clamp on the bypass hose or maybe you damaged the heater core tube when you installed or removed the bypass hose and now it is not sealing properly.

Dec 18, 2016 | 1991 Buick LeSabre

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Changing heater core on a 1998 buick lesabre

How long does it take to swap out a heater coil in a 1999 Buick LeSabre

Mar 03, 2013 | 1998 Buick LeSabre

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What is the cause of the heat going out?

Either the heater core is plugged or the blend door is not allowing a hot heater core's heated air to reach the passenger compartment.

Jan 08, 2011 | 1991 Buick LeSabre

1 Answer

I need to know how to replace the heater core, is it something i can handle or do i need to take it somewere?

usually not that hard on an older GM. locate approx location of heater core by looking for two matching size water lines that enter the passenger compartment thru the firewall from the engine compartment. go inside under dash and look for the heater core box. remove screw to open and expose the heater core

Sep 08, 2010 | 1993 Buick LeSabre

1 Answer

Anti freeze leaking into car vents

The heater core is leaking, causing engine coolant to enter the ventilation system in the vehicle. The heater core will need to be replaced.

May 13, 2010 | 1991 Buick LeSabre

3 Answers

There is antifreeze coming from the vents. heat does not work

Your heater core is leaking. It will need to be replaced ASAP.

Dec 09, 2009 | 1991 Buick LeSabre

1 Answer

I believe that i have a blown heater motor fuse on a 1991 buick lesabre. which fuse is it and where is it located?

Check the power at the connector to the blower motor with a test light or gauge. Mine would blow at times and I turned it on unplugged connector and reconnected . It works fine after I cleaned and fixed it.

Dec 07, 2009 | 1991 Buick LeSabre

1 Answer

1994 buick lesabre heater core removal

The heater core is located under the dash, in the center. The container holding the core looks like a black plastic box. Remove the ash tray for easier access. You may have to also remove some other covers under the dash. You must first drain the radiator then you have to disconnect the hoses. There are two hoses connected to nipples of the heater core that go thru the center of the firewall. Remove the screws that hold on the cover to the heater core. Then you should be able to get the old one out. There might be a couple of other minor steps but I'm sure you can figure them out. For re-installation just go in reverse order to put it all back together.

May 25, 2009 | 1994 Buick LeSabre

1 Answer

Ihave no heat on my 1991 buick lesabre

A device called the "blend door" may be inoperable; this is located in the heater exchange box on the firewall...accordianman

Dec 15, 2008 | 1991 Buick LeSabre

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