Discovery rear air suspension sitting down overnight

May be a shock. Never heard this before but shocks fail in weird ways

dear,,,you need to change air baloon, it might leaking.

check for leaks in the lines, also check to see if the shocks have air leaks.

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.

The air suspension system should stay up for several days without going completely down, which probably means that you have a small leak which is quite common even on relatively new air bags or struts.

A general rule of thumb is that if the compressor isn't kicking on several times during a drive then they are good to go. The air bags are a pain to change, so most people don't change them until they are really bad.

possible air leak use soapy water and spay bottle to locate

You will find that the rear air suspension hose has failed. To check, wieh the car running listen for a loud hiss. That is where the leak is. Take it to a dealer you pay $200 plus. Fix it yourself,fifty cents.

Chanses are the leak willbe at the drvers side rear connector to the shock. hope that helps

ash

vote please

Probably an air leak in one of the bags (£100 or so), should replace it as your compressor will be working harder than it should be, and will eventually also fail!
Could also be the height sensor (£35) but that is less likely.

ten to one your boot (the thing that holds the air) was damaged either by the blowout or by the tech what repaired your flat. Probably by the blowout.

If you have the coil spring suspension, then your spring for that corner has really sagged[doubtful] I suspect you actually have the rear air suspension ,and the air spring for the Right/Rear has lost air, allowing the rear end to lower down greatly. Usually, you need a new air spring when one develops a leak. You may or may not be able to see the leak with a spray solution of soapy water after the spring is removed for inspection. Sometimes you have to apply about 20psi of air pressure into the spring to inflate it a bit, then put the spring under water in a big enough tank/tub of water to catch the leak that way.