Question about 2000 Buick LeSabre

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I have a 1998 Buick Park Avenue Ultra. I need detailed instructions and diagrams to replace the AC/Heater blend door Actuator for the Driver side. Also where is the Outside/Inside Actuator located, and how can I test it to verify it is working correctly? Also I need detailed instructions and diagrams to repair the power seat track motor drive assembly because the seat does not move up and down or tilt. Thanks, Jeff

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Alright ready. Unfortunately I can't provide the diagrams online. I can provide the help when you have questions while working on this and will respond as quick as possible when you get stuck and can't figure out what to do next. What you need to do to get diagrams and instructions all in one is buy a repair manual especially if you are planning on doing basically everything yourself on this car. They are called a Haynes or a Chilton manual (two different ones specific to your car). You can get them at any auto parts store and will provide the information you need to get to those parts. and to replace them.

Basically to get to the door actuator, You need to remove the whole dashboard. It is a long and tiresome process and it will be located more towards the passenger side of the car. Keep parts in order when you remove them, maybe taking pictures along the way (You will be glad you did). Also make sure the battery is disconnected while tearing it apart especially since this one has airbags I believe. If you want to test the actuator, then you need to make sure the control switch is getting voltage and is sending it down the wires with a voltmeter to the actuator motor (This requires pulling the climate controls off and having the battery connected and the ignition on at this point).

The power seat is bolted down with probably 13 mm bolts, you should be able to pull the whole seat out (which I recommend especially if you have to pull the dash apart) and then you can apply voltage to it and see if the motor will work at all or make sure certain parts are getting voltage (again with a volt meter, easy obtained from an electronics store such as Radio Shack).

Please get the manual and when you have specific questions, post them and I will answer them as quickly as I can. If you can post pictures of the problem when you get to them, that would help too in case I don't quite understand you. Let me know how this turns out.


Posted on Jul 17, 2009

  • Benjamin Patri
    Benjamin Patri Aug 03, 2009

    Can I please ask what was wrong with my solution that you requested a refund?



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My 98 Buick Park Avenue has driver and passenger AC settings but the passenger side always blows hot air. Very cold on drivers side. Why??Can't stand the heat even when vent is closed.

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Mar 04, 2014 | 1998 Buick Park Avenue

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assuming you have an electronic controlled (digital) dual zone system, it is most likely your heater blend door motor has failed, check and see which side is operating and buy the one you need and replace, it has 2 or 3 screws on the side, i think size is 4.5 mm or 5.5 mm and you have to take off lower plastic cover under dash and remove screws which go on horizontally... install heater door with temp swithched to the middle, move door to middle, if not you need to place new motor into plug before installing and turn temp to cold, then turn by hand the white blend door tube to match motor then install... make sure you turn off ignition when working,,,

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The heater blows cold air-sometimes warm, but only intermittantly and only on the drivers side. Had the thermostat changed, but that didn't help. Any ideas?

Assuming that the car has dual climate control...
There is an air blend door actuator that controls the air blend of the climate control system. If the link that connects the actuator to the lever that opens and shuts the heater core became disconnected, then depending on the direction of the last bump you went over you opened or shut the heater core. The actuator and link for the drivers side are behind the dash and hard to get to.
If you want to know what you are looking for, the one on the passenger side is very accessible. Just drop the glove box, and looking somewhat upwards behind the air bag door, you'll see a white lever with a metal rod connecting it to the actuator motor. Just change between heat and AC and watch it move.
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This is most often caused by a defective air temperature blend door motor, this is whhat controls the temp of the air coming out the dash register vents, the actuator is deep in the dash, u must remove the entire dash assembly to replace the part.

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My 1997 buick park avenue when i open the ac on the passenger side it blows cold air and on the driver side hot air how can i fix this

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sounds like the drivers temp door actuator is not working should be located on the drivers side of the air box down by the gas pedal or center dash area

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