Z55 rear air shock good/bad?

[sam03v]

Hello,

I've recently bought a 2010 Tahoe LTZ, with the Z55 RPO and I'm fairly sure the rear shocks need replacing. Every time the ignition key is turned on, the compressor kicks on after ~15 seconds, but I can't see the rear of the truck rise at all. I hooked my boat trailer up to it, the compressor came on but it didn't see any rise. I'm not familiar with these air shocks except what I've read online. The rear shocks look rough, the rubber boot looks ragged on both shocks. Is this rubber boot actually supposed to inflate or is it a protective cover? I can squeeze this boot with my hands and they are both flat after the compressor kicks on and off. Please see the attached picture.

 

[George B]

The compressor running at key on is normal. Yes, your shocks look to be shot. You can spray the shocks with soapy water to see if they leak.
You can read up on this thread for more info on what to do from here.

Autoride suspension help

I have a 2009 Yukon Denali Xl. For the past few months the Autoride compressor has been super noisy and running constantly. 2 weeks ago, I decided to replace the rear shocks with Arnott rebuilt units. After replacing the compressor was still noisy which is knew it would be, but it would run as...

www.tahoeyukonforum.com

 

[sam03v]

The compressor running at key on is normal. Yes, your shocks look to be shot. You can spray the shocks with soapy water to see if they leak.
You can read up on this thread for more info on what to do from here.

Autoride suspension help

I have a 2009 Yukon Denali Xl. For the past few months the Autoride compressor has been super noisy and running constantly. 2 weeks ago, I decided to replace the rear shocks with Arnott rebuilt units. After replacing the compressor was still noisy which is knew it would be, but it would run as...

www.tahoeyukonforum.com

Thanks. My main question is whether or not those rubber boots are supposed to be filled with air or are they just covers??

 

[George B]

Thanks. My main question is whether or not those rubber boots are supposed to be filled with air or are they just covers??

They should be filled with air. If they are not firm with air pressure you have a leak. The leak could be the bladders themselves or the compressor relief valve. I replaced the entire system on my truck.

 

[George B]

I can tell from your photo your shock is shot.

 

[avalonandl]

Arnott from Rock Auto. Send the cores back and they give you 100$ quickly

 

[sam03v]

thanks for the replies. I sprayed soapy water on the shocks, but didn't see any bubbles. But like I said that rubber section does not inflate at all..maybe the holes in the bladder are just too big??? I can hear air venting after the compressor stops. I'll try to find the compressor relief valve and spray it with soap water

 

[George B]

thanks for the replies. I sprayed soapy water on the shocks, but didn't see any bubbles. But like I said that rubber section does not inflate at all..maybe the holes in the bladder are just too big??? I can hear air venting after the compressor stops. I'll try to find the compressor relief valve and spray it with soap water

You will hear air vent after the compressor runs it’s test at key on.
I have a tech2 which made diagnostics easy for me.
You need a pretty good load on the back of the truck to get it to try to adjust the ride hight. I could turn the compressor on with my scan tool and watch the pressure drop off right away. If you order up the Dorman compressor and the rebuilt Arnott shocks you will be in business.

 

[TollKeeper]

Dont do anything with the compressor except unplug it. Its currently working, at least by sound. Unplug it.

Replace your shocks, I suggest the Arnott replacement above, but buying them thru Summit Racing is the cheapest, for the same part.

Find the part you need directly on the Arnott website.

Arnott Industries | #1 Replacement Air Suspension

Arnott Industries is the global leader in aftermarket automotive air suspension. From air struts to coil conversion kits, Arnott has it all.

www.arnottindustries.com

Take that part number and plug it into the Summit search engine, you should find them.

There are 3 separate part #'s shown on the Arnott website.

AS2708 is a direct rebuilt part, and it will work like it did from the factory.

AS2715 is a new replacement part with simulators to fool the factory system.

AS3430 is the same as the AS2715, just a cheaper variant.

Once you replace the shocks, plug the compressor back in. See if the air bags fill. If they fill, you should be golden. if they dont fill, unplug the compressor, and likely you will have to replace it.

If you need a compressor, I used the Dorman brand thru Amazon. Best price. Not had any issues with the Dorman brand on this part (cant say that about any other part they make thou!)

 

[George B]

With the Arnott shocks you may find the drivers side air line is too short as well. The connection is located lower that the factory.

 

[TollKeeper]

With the Arnott shocks you may find the drivers side air line is too short as well. The connection is located lower that the factory.

Thats true for one of the shocks with simulators. The rebuilt ones dont have that problem

 

[George B]

Dont do anything with the compressor except unplug it. Its currently working, at least by sound. Unplug it.

Replace your shocks, I suggest the Arnott replacement above, but buying them thru Summit Racing is the cheapest, for the same part.

Find the part you need directly on the Arnott website.

Arnott Industries | #1 Replacement Air Suspension

Arnott Industries is the global leader in aftermarket automotive air suspension. From air struts to coil conversion kits, Arnott has it all.

www.arnottindustries.com

Take that part number and plug it into the Summit search engine, you should find them.

There are 3 separate part #'s shown on the Arnott website.

AS2708 is a direct rebuilt part, and it will work like it did from the factory.

AS2715 is a new replacement part with simulators to fool the factory system.

AS3430 is the same as the AS2715, just a cheaper variant.

Once you replace the shocks, plug the compressor back in. See if the air bags fill. If they fill, you should be golden. if they dont fill, unplug the compressor, and likely you will have to replace it.

If you need a compressor, I used the Dorman brand thru Amazon. Best price. Not had any issues with the Dorman brand on this part (cant say that about any other part they make thou!)

This is good advice. Sorry for my short answers. Been busy at work and running around getting covid tested. I will be happy to answer any questions about the system as I have serviced mine extensively.

 

[George B]

Thats true for one of the shocks with simulators. The rebuilt ones dont have that problem

Mine did and I did buy the AS2708 shocks and had to use a longer line on the driver side. Others here had the same issue. I think @Doubeleive?

 

[TollKeeper]

Mine did and I did buy the AS2708 shocks and had to use a longer line on the driver side. Others here had the same issue. I think @Doubeleive?

Thats just really weird... All they do with the rebuilt units, from what I was told by Arnott, is verify the function of the shock itself, make sure it meets factory specs, paint it, and replace the bladder. Maybe they are actually rebuilding the internal valving, and oils.. If so, the price they are selling them is a huge savings!

 

[George B]

Thats just really weird... All they do with the rebuilt units, from what I was told by Arnott, is verify the function of the shock itself, make sure it meets factory specs, paint it, and replace the bladder. Maybe they are actually rebuilding the internal valving, and oils.. If so, the price they are selling them is a huge savings!

When did you get yours? I called and talked to them February 2021 and they indicated that they were rebuilding them with new seals and bladders. When mine came I could see that they had blasted and painted the body of the shock but they had a new rod end and connector as well as a new bladder and plastic bladder cap. Here is what they told me via email and that backs up a phone call I had with them.
https://www.tahoeyukonforum.com/attachments/upload_2021-2-25_11-0-11-png.271811/

 

[Doubeleive]

Mine did and I did buy the AS2708 shocks and had to use a longer line on the driver side. Others here had the same issue. I think @Doubeleive?

ya I had to buy a nbs oem air line kit and use one of the lines from that kit, the arnott shock made the drivers side really tight
Don't buy a dorman air line kit they don't come apart

 

[Doubeleive]

Thats just really weird... All they do with the rebuilt units, from what I was told by Arnott, is verify the function of the shock itself, make sure it meets factory specs, paint it, and replace the bladder. Maybe they are actually rebuilding the internal valving, and oils.. If so, the price they are selling them is a huge savings!

the whole top portion of the shock is now changed they did a redesign from when they first started producing the refurbished units

 

[sam03v]

Thanks for the replies. I'll probably buy a pair of Arnott shocks soon. What are the opinions out there on the front "electronic" shocks that come with the Z55 option? Is there a way to check them?

 

[TollKeeper]

There is.. Requires a Tech2 scan tool.

Did you unplug the air compressor? Its just a relay on the side of the under hood fuse panel.

 

[sam03v]

No I haven't unplugged the compressor...I'll do it tomorrow. Thanks for the reminder