[gmercedesbenz]

Ok, so today I took my truck into my local Midas because I knew something was wrong. My back-end was swaying on the highway a tad and I figured I'd have them look it. Well, turns out both the bags in my rear shocks were torn. So, I had them replace the shocks. (We won't get into how much the parts cost...) I asked the technician if my compressor was Ok and he said that he is assuming its fine. Now, the truck definitely rides 100x better and actually sits a little higher. My question is, how can I be sure that my compressor is operating just fine? I don't think I've ever heard it before, is it a distinct sound, like the compressor that runs for filling tires with air? Can you hear it from inside the car at idle, or do you have to be outside and next to the rear wheels?

Oh and just a side note, my Service Ride Control message has NEVER come on and continues to not show. I'm assuming this is a good sign

Thanks In Advance!

UPDATE: So I did some digging through the archives, from what I've read this compressor can be loud and obvious or quiet. So I just now went out and turned the key to Run, ran back and put my ear next to the rear wheel and heard a quiet humming noise that lasted about 3 seconds. I turned the truck to off, turned it to on again, and heard the hum again. I'm assuming this is startup test for the pump?

 

[the cadillac man]

check the fuses and relays one might be bad

 

[04CadEsc]

Yeah, I'm thinking something is wrong...I have a 2004 Escalade and my compressor is loud...I hear it EVERYTIME I start my car and sometimes at idle if the radio is off. It's ANNOYING!!!! :banghead:

 

[gmercedesbenz]

Ok so I followed the directions in the 1million question thread and jumped the two red wires in the compressor relay. No noise that I heard and truck didn't get any higher. I'm not sure if the sound I mentioned before was present, because I was at the front of the truck. I'm assuming that the compressor is dead?

 

[the cadillac man]

the escalades have the rss so it will drop the rear some in hight after you get over i think 55 i looked it up and yes you know it will driving mine did that a few times before the compressor quit on my lade

 

[js trans]

mine to but lately it seems to come on more often i"m afraid to look $$$$$$$

 

[torched10]

OK where"s is the compresor--i was hearing mine every time i started the car for a little while, then it would stay on for maybe a minute,now it doesnt come on.Thought id test the realy as you did,before i bought the Arnott unit to replace the compressor.I posted elswhere on the question about a shut off switch.I caleld a friend of mine who owns a repair shop and explained my probelm--he says he sees Escalades all the time that have accidentally turned off a switch that controls the leveling function--he hadnt worked on an EXT,but the regular Escalades have shut off switch--im brinig it to him Monday....bob

 

[jordan00escalade]

Compressor is on the drivers side, just behind the rear shock. The compressor should come on every time you turn your key to the run position. If it doesn't you have a problem. There's also a fuse for the compressor under the hood.

 

[Dax]

OK where"s is the compresor--i was hearing mine every time i started the car for a little while, then it would stay on for maybe a minute,now it doesnt come on.Thought id test the realy as you did,before i bought the Arnott unit to replace the compressor.I posted elswhere on the question about a shut off switch.I caleld a friend of mine who owns a repair shop and explained my probelm--he says he sees Escalades all the time that have accidentally turned off a switch that controls the leveling function--he hadnt worked on an EXT,but the regular Escalades have shut off switch--im brinig it to him Monday....bob

I'd go ahead and get the Arnott replacement. It also comes with new mounting grommets which SIGNIFICANTLY reduce the noise it makes as well as a dryer overhaul kit. My 2004 doesn't have a switch controlling the auto-levelling suspension but maybe some people have those which they installed themselves.

i can barely hear it come on now from outside the car, and not at all inside.

 

[torched10]

sorry for being so anal, but which fuse is it--or isit labeleld as such--thanks also is the relay near the compressor too---bob PS found the fuse--its OK--now ill test the compressor by jumpimng the relay

 

[seaman.40]

I vae the same problem on my 02 .Have you found any answer about it, is that normal or time to replace for new compressor

 

[Guest]

hey guys how long is the compresser suppose to run? mine runs for around 5mins... i think it was more like 2mins a couple yrs ago. is that a sign of a leak or worse? thx for any info

 

[bizzob223]

Mine runs for about 15 seconds if it is just me driving. If I have it loaded it runs much longer.

 

[William01]

mine comes on everytime I turn the key for about 10-15 seconds and then sometimes while sitting also. It is pretty darn loud, actually when I first started to notice it, it would freak me out thinking that something was wrong woth the truck. Then I started to research about these trucks and figured out they are supposed to do that.

 

[Old Guy]

yeh my runs about 8 seconds the first time then about 15 seconds anytime after that under normal loads, original shocks probly have a small leak since they have about 90,000 miles on them.

 

[Cameron0588]

I have a 2002 Cadillac Escalade and my Air shock compressor turns on sometimes. Not every time I turn the car on. The compressor only runs for about 3 seconds and is loud.