2007 Denali recently installed rebuilt Arnott rear shocks

[acarnacchi]

I've recently replaced the air compressor and rear shocks on the truck.

I Was installing weather tech mud flaps yesterday and noticed that when I jacked up the truck to remove the rear wheels that the shocks drooped and the upper shock cover that is connected to the air bags dropped down and pulled the electrical and air connections very taught and exposed the shock pistons.

I was able to pull that part of the shock back up by hand to relieve the tension. It seems the drivers side is very taught even in normal conditions as well. When I was done everything seemed to connected properly (air lines and electrical connections).

Today while towing a 6000lb boat and trailer I had no compressor kick on and a service suspension message on the dash. The day before I towed a landscape trailer and had no problems, compressor worked fine and suspension seemed to level properly.

Any insights would be helpful.

 

[HUMBL57]

Did you jack the truck up by the middle of the axle or the frame? I'm guessing you may have pulled a line or something if the axle was drooping and hanging by the air lines. Could you have installed the shocks upside down?

 

[TheAutumnWind]

Interesting. I don't think I had any such issues with my stock rear air setup. Maybe a picture or two would help.

 

[acarnacchi]

Here is a picture I snapped today after thinking that I had some excessive clunking noises. It has been very cold in Michigan the last couple weeks so I had initially attributed it to that.

This is the passenger side, as you can see the shock piston is exposed and some kind of o-ring. I had noticed previously that both sides had sagged like this in the past, the 0-ring is a new observation.

 

[JML07denali]

I'm not sold on Arnott. My prior car was a 2002 mercedes s500 with factory air ride. I purchased arnott air shocks and nothing but problems. I had a loud knock noise coming from the struts, they sent me another set and had paid to get them installed again and same problem. I finally got fed up and they sent me rebuilt OEM struts and that did the trick.

 

[pwtr02ss]

The problem with the arnott setup, is that they don't rebuild shocks. They just replace the air bag. You could get lucky and get some lower mileage shocks that just had a bad bag, but you could be buying a shock/strut with 300k miles on it. Save your time and buy new.

 

[bmwme]

I'm not sold on Arnott. My prior car was a 2002 mercedes s500 with factory air ride. I purchased arnott air shocks and nothing but problems. I had a loud knock noise coming from the struts, they sent me another set and had paid to get them installed again and same problem. I finally got fed up and they sent me rebuilt OEM struts and that did the trick.

Interesting...

I had a working system for about 6 months after I replaced my Tahoe electronic air shocks...but now the system is throwing codes and I have a knock coming from the rear...

 

[acarnacchi]

So after replacing the bad arnott shocks with a new set of arnott shocks I am having a new issue. My compressor is not kicking on at start up, If i jump power straight to the compressor everything works as it should. I get a service suspension code about half the time and the other half nothing.

How do you read what the service suspension code is? I'm assuming you need a gm scan tool and not just a generic code reader.