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2003 DeVille load level compressor issue

1K views 4 replies 4 participants last post by  basscatt 
#1 ·
2003 DeVille base 99K miles, FE1 suspension. Load level compressor running too often. Hoped that replacing the blown out rear shocks would solve the problem, but no. Where do I look now? Is this a DIY issue or do I need a professional wrench?
 
#2 ·
If the compressor is running too often, there is a leak somewhere.......

Air bottle sprayer filled with soapy water will aid you in finding the leak.

You will spray the soapy solution on all the fittings and joints. Any bubbles, there's the leak.

Check how the hoses to the shocks are routed, check for abrasions.

Good luck
 
#3 ·
2003 DeVille base 99K miles, FE1 suspension. Load level compressor running too often. Hoped that replacing the blown out rear shocks would solve the problem, but no. Where do I look now? Is this a DIY issue or do I need a professional wrench?
==============================
Load level compressor running too often
every time you turn the ignition on -
the compressor goes through a self-check -

other than that - the compressor should only run
when a load is added to the trunk or back seat -

that means you have a leak somewhere -

a somewhat common problem is the compressor assembly -
or more specifically - the exhaust solenoid built into the compressor head -

check for codes - you are looking for "C" codes -
C1737 - or C1738 -

there is no "easy way" to check for leaks -

the "best" way is to raise the rear end and support it on jackstands -

remove the rear wheels -

pop off the connecting rod of the ride height sensor off the lower control arm -

turn the ignition on - no need to start the motor -

radio - climate control etc all turned off -
you need a quiet environment -

push the connecting rod UP -
this will simulate a sagging rear end - and will start the compressor -

you can inflate the air bladders with up to 120 PSI -
without hurting them - but you shouldn't need anywhere near that much -

just inflate them until the bladders are very firm when you squeeze them -

next - move the rod DOWN until the compressor turns off -

now LISTEN for an air leak -

HINT - you can use a short length garden hose - or similar - like a stethoscope -
hold one end to your ear - "aim" the other end at other areas along the airlines -

take your time - and be thorough -

if you hear something -
you can use the soap-water in a sprayer to verify the leak -

if you do NOT hear anything - use the soap-water in a sprayer method -
and spray down all the lines - pay particular attention to the connections -
and also where the supporting clips are -

also spray down the bladders -
it is VERY rare - but "new-defects" can happen -

-------------------

if the compressor is bad - you have a couple choices -
try "rebuilding" or cleaning the compressor -

a few members have combined parts from several used compressors -
to make up a good working unit -

the other option is to replace it with a brand new one -
DON'T WORRY - you won't have to pay the $800 the dealer wants -

here is a brand new genuine GM 12494809 - $237 - with free shipping -
http://www.ebay.com/itm/Arnott-Air-...Parts_Accessories&hash=item33886103c6&vxp=mtr

or - if you just won't use ebay -

$253 - with free shipping -
http://www.buyautoparts.com/no-ymm-...fno=12494809&gclid=CPyL54a6vL8CFQwDaQodch0AhA

 
#4 ·
if u ask me its normal, i have left several post on this subject because my 03 deville does the same thing, compressor, lines and shocks all replaced i have absolutely no leaks and it quit frequent comes on, its been doing it ever since i bought the car in 08 with 29k on it, just drive it and dont worry, but im sure someone will tell me im wrong
 
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