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2000 park avenue: automatic leveling control stuck fully elevated in rear

ajh

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2000 buick park avenue
the leveling control has malfunctioned on my mom's 2000 buick park avenue so that the rear end is fully elevated. i hear no pump running. it has been like this for weeks with no change and pushing down on the trunk is very solid. the trunk lid now is so high when it is open that she can hardly reach it! i'm hoping to try to fix it before an expensive trip to the mechanic's shop, or at least identify the issue and price out the part(s). she feels like a 70 year old driving a muscle car - not quite her style, especially in a park avenue.

if this is a redundant topic, please point me in the right direction as i could not find it, and accept my apology.

2000-park-avenue.jpg
 

ajh

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i found this text for troubleshooting the automatic leveler of a 1997 buick lesabre, but do not know if it applies to this car. i'm posting it in case any of it applies to this vehicle, and in hopes that the general procedure posted there may trigger a solution to my mom being able to reach the trunk lid after she grabs the groceries. ;)
 

HotZ28

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You did not attach an link to what you found about the LeSabre level control, which is nearly identical in function to the PA. However, if it mentions the level control sensor as the culprit, that would be my fist suspect.
 

ajh

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You did not attach an link to what you found about the LeSabre level control, which is nearly identical in function to the PA.
i thought that i linked to the word "text" in my previous post.

i found this *text* for troubleshooting the automatic leveler of a 1997 buick lesabre
here is the full hyperlink to the procedure i was looking at:

https://www.2carpros.com/questions/buick-lesabre-1997-buick-lesabre-faulty-rear-air-ride
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ajh

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i took my mom's car to the dealership and they put it up on the hoist, immediately found a broken piece of plastic on a little arm, and then charged me $50 for the estimate in which they said they could not replace the part as it was unavailable to them. i will patch it with a zip-tie and order one off the internet. moving the lever that the arm was attached to towards the rear of the vehicle lowers the suspension.

so for the quick fix, crawl under the rear of the car and pull the arm closer to the rear of the vehicle to lower. just be careful that you don't lower the car onto yourself!!! it stayed in place on the ride home from the dealership without the arm (as i took it off - it popped right off) but would likely migrate one way or the other with use until it is patched.

i would suspect that this broken piece could also cause the car to be too low if the lever was left too far towards the rear of the vehicle.

buick-leveler-arm-location.jpg

buick-leveler-arm-closeup.jpg
 

HotZ28

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I don't have any idea why the dealer told you the link was unavailable? The level control link is still available from the dealer as Stock Code 22153293 ; 22175631 shown as Item #3 in the diagram. Any GM dealer should be able to order it for you!
i would suspect that this broken piece could also cause the car to be too low if the lever was left too far towards the rear of the vehicle.
That is correct. The level sensor adjustment is critical for ride height and the adjustment is very sensitive.




http://www.wholesalegmpartsonline.com/showAssembly.aspx?ukey_assembly=381870&ukey_make=1022&ukey_model=14443&modelYear=2000&ukey_category=19404&ukey_trimLevel=15001

Product Fitment/Applications:

Buick Lesabre 4DR CUSTOM 2000, 2001, 2002, 2003, 2004, 2005
Buick Lesabre 4DR LIMITED 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Deville 4DR Base 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Deville 4DR DHS (HIGH LUXURY) 2004, 2005
Cadillac Deville 4DR DTS (TOURING) 2004, 2005
Cadillac Deville 4DR HEARSE 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Deville 4DR HIGH LUXURY 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Deville 4DR LIMO 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Deville 4DR Touring 2000, 2001, 2002, 2003, 2004, 2005
Cadillac Seville 4DR Base 1998, 1999, 2000, 2001, 2002, 2003, 2004
Cadillac Seville 4DR SLS 1998, 1999, 2000, 2001
Cadillac Seville 4DR STS 1998, 1999, 2000, 2001, 2002, 2003, 2004
Oldsmobile Aurora 4DR 3.5L 2001, 2002, 2003
Oldsmobile Aurora 4DR Base 2001, 2002
Pontiac Bonneville 4DR GXP 2004, 2005
Pontiac Bonneville 4DR SE 2000, 2001, 2002, 2003, 2004, 2005
Pontiac Bonneville 4DR SLE 2005
Pontiac Bonneville 4DR SLE GXP 2004, 2005
Pontiac Bonneville 4DR SLE SSEI 2000, 2001, 2002, 2003
Pontiac Bonneville 4DR SSEI 2000, 2001, 2002, 2003
 

tmeeks

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Crazy but I have a 2001 PA and having the same issue. Went over a really big dip about 6 weeks ago and the back right shock fully compacted. Thought the shocks were bad so replaced them both. After replacing the shocks the car went to a fully elevated position as the one above. Finally found this post.

I checked the Level control link rod and it is attached and not broken. Was going to try to test the items I could without tools at this link: https://www.2carpros.com/questions/buick-lesabre-1997-buick-lesabre-faulty-rear-air-ride

I'm guessing based on the quote below, that the next item to suspect may bee the Level Control Sensor, which is item #1 on part list farther below.
You did not attach an link to what you found about the LeSabre level control, which is nearly identical in function to the PA. However, if it mentions the level control sensor as the culprit, that would be my fist suspect.
http://www.wholesalegmpartsonline.com/showAssembly.aspx?ukey_assembly=381870&ukey_make=1022&ukey_model=14443&modelYear=2000&ukey_category=19404&ukey_trimLevel=15001

I was going to try TEST 2 on the carpros website link?
Any suggestions?
 

tmeeks

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Having the same issue with my 2001 PA (was my grandmother's...has only 80,000miles). Hit a serious dip about 6 weeks ago and the back right shock fully compacted and didn't release. So decided to replace the rear shocks. Don't recall exactly when but then the car rear went fully elevated.

Checked the level link rod that was broken on the car above and mine is intact. This weekend was going to do some of the tests on the carpros website mentioned above. Was going to focus on the level control sensor.

Any suggestions on testing or other solutions?

thanks,
Tim
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Spriteman

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This is the linkage arm for your 2000 PA - part #11 in the diagram - PN 25604758

http://www.wholesalegmpartsonline.com/showAssembly.aspx?ukey_assembly=369009&ukey_make=1022&ukey_model=14446&modelYear=2000&ukey_category=19409&ukey_trimLevel=25267

This part is available on ebay and Amazon


As far as testing is concerned - just remove the linkage arm and manipulate the sensor arm up and then down to test if the compressor is pumping the shocks up and then to ensure that the vent valve is releasing air went commanded.

The results from this test should give you a direction for your next test.
 

tmeeks

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Spriteman,

i removed the link arm from the sensor and moved the sensor arm up and down. Nothing happened at first.
However, after turning on the ignition and moving the arm to the lowest position and waiting for 30 seconds, I heard the level sensor air compressor turn on. It seemed to run as long as the arm was in the lowest position.

I looked at both the interior and under the trunk fuse boxes and on the interior found an ELC fuse. I checked it and it seemed fine.

What do you suggest next?

thanks,
Tim
 
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tmeeks

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Seeing if anyone else might have a suggested next troubleshooting.
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