What do I need to do if the air suspension in my 2006 Buick Rainier will not stay aired up? When left overnight, the back end is all the way down... and there is NO LOAD in the cargo area! Every time I stop at a light, I can hear it pumping back up. At one point, when we were experiencing below zero windchills for several days in a row, it completely froze while down and it rode like a covered wagon. It finally pumped back up when the temps got above freezing.

It is part of the airmass sensor on the end of the air intake pipe attached to the airbox

Nothing to reset. If the compressor won't come on it's probably gone. If you ever drive your car in high water you have submerged it. They aren't cheap. Around 600.00 for parts. Labor is extra.

You can but will cause damage to rest of suspension, possibly floor pan and may even damage wheel. Generally not a good idea to drive with broken suspension.

The leak is probably in the air bags or a supply line. The pump probably burned out trying to keep the system supplied. You're lucky it didn't run your battery down.

there is a rod attach to rear suspension and air leak by small plastic hose

If they air up and sag again after time or overnight, the bags have a leak. Mine did the same thing. When you're driving it usually wasn't an issue because the compressor is live and kicks on as needed. Replaced the air shocks, under $200 for parts. I bought mine at Advance, online for somewhere around $180 I believe. Only about an hour job.

Not a mechanic, but had the same issue, replaced the air suspension with traditional coils and shocks, total cost about $150 did it myself, really very easy. No more issues and it rides better! Will take you about an hour and a half, tricky getting the axel to drop down low enough to insert the spring, utilize a small pump jack between the axel and frame, hope this helps.

There has been a service bulletin for that type of concern. Here is what it states.









Suspension - Rear Suspension Is Low/Sagging/Uneven

Notes




ENGINEERING INFORMATION

Bulletin No.: 06-03-09-006B

Date: December 15, 2008
Subject:
EI06006 - Rear Suspension Uneven, Sagging, Low (Recalibrate Air Spring Sensor)

Models:
2006-2007 Buick Rainier
2006-2007 Chevrolet TrailBlazer SS
2006-2007 GMC Envoy, Envoy XL
2006-2007 Saab 9-7X


with Suspension Pkg - Rear Load Leveling (RPO G67)

Supercede:

This bulletin is being revised to update the labor operation in the warranty information. Please discard Corporate Bulletin Number 06-03-09-006A (Section 03 - Suspension).

Condition

Some customers may comment on the rear suspension being uneven or sagging.

Correction

DO NOT REPLACE THE COMPRESSOR.

Based on technician feedback, engineering has determined that the customer's concern can be corrected by recalibrating the air spring sensor. Refer to the Trim Height Uneven or Low diagnostics and Air Spring Sensor Calibration procedure found in SI.

Sorry to say there is no cabin air filter in a 2006 Rainier. Call your closest Buick dealer and they will tell you the same thing.

the rubber on the suspension that inflates is worn. it may have some dry rot. you can replace them but it will cost you a lot plus your pump is working overtime and that will wear out and add to the cost of repair. You can get a conversion kit where coil springs are installed and it will be a lot cheaper