SOURCE: Rear Air Shock Problems
springs & air bags in the shock hold the truck level
if they are wet with oil the seal is leaking
replace the shocks
SOURCE: 2004 yukon xl denali self-leveling rear air shocks
There's a lever that connects the driver-side rear shock to the Automatic Level Control module (the air compressor and the ride-height sensor). Disconnect the lever from the shock and rotate it up and hold it. The compressor should kick in when you hold in place after a few seconds. If it doesn't kick in, make sure your fuses and relays are good. Otherwise, you may have a failed ALC module/burned out air compressor (from the shocks being shot). After you replace the shocks (and after you recouped from the heart attack you had when you shelled out $500+ for each shock), replace the ALC module/compressor (it's all one unit), and test it - it should kick on when you rotate the lever up again.
Figure about $350 for the ALC module from your dealer, and make sure the part numbers match! Your truck came with an upgraded ALC module from the 2001-2004 module, which were prone to water damage.
Good luck!
SOURCE: Replace Rear Shock Air Compressor
i am not really sure but for the most part its under the hood just inside one of the fenders but i would like to give you this number they only sells GM- parts its Schram auto & truck parts # 1-800-292-1032
SOURCE: 98 cadillac deville needs rear shocks
I have a 1998 Deville and both rear coil springs are broken.. It also has the air shocks that I dont think work.. Can I put regular shocks in and is there a after market coil spring out there for it ??
SOURCE: location of the fuse to the compressor of rear air shocks
auto level fuse box is located at rear of car under near suspension carrier, all fuses and relays to do with level ride are there, good luck.
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