I am looking at purchasing a 2006 Suburban with 78,000 miles that is fully, I mean fully loaded, even has the second row bucket seats and probably more electrical stuff that I'll ever use. There are two RPO Codes that I'm not sure what they mean. The first is Z55 and its described as "Chassis Package Bi-StateReal Time Damping" and then second is G69 which describes as 'Level Control Auto Level Control". Now these are obvious suspension options and my question is what, in plain English, do they do and is there any expensive OEM parts to them that I will need to be replacing at 100,000 miles or so? Thanks for your help. I haven't posted much on here but lurk a lot.

 

Sounds like the Autoride suspension, and yes, it does have some bits that are pricey to replace.

 

It sounds like the Autoride setup in the GMT900s. If that's the case, then replacement is a bit pricey. However Arnott (forum sponsor) sells an affordable replacement standard shock for it.

 

Thanks for the info.

 

You have the auto ride package as well as all wheel drive and traction control. With the auto ride suspension there are some very pricey parts. You should have a small electric air compressor in the left rear wheel well to automatically adjust the rear air shocks to keep the truck level when loaded or towing. The shocks from gm are all most $700 apiece.

 

Thanks for the info and links. When you say the compressor is in the wheel well do mean inside or outside the Burb and yea it maybe a dumb question but at my age i don't assume people do the right thing anymore and I wouldn't be surprised if GM stuck on the outside of the truck so they could sell a new one within a few years.

 

If it's similar to the 2007 models and up, the compressor will be behind the driver side rear wheel on the outside by the frame.

 

Still learning the site hope I am doing this right but the compressor is accessed from the outside tucked up in the top of the wheel well right above the axle on the drivers side.

 

I found this UTube video on changing out compressor and if I have ever seen "Planned Obsolescence" this is it. Where the compressor is located it will get all the crap from road hitting it constantly. Why wouldn't GM put it in a sealed box and use hard lines encased in rubber to protect the compressor.



I have been haggling with the seller all week and we are still 1500.00 apart.