Question about GMC Yukon XL
2003? original shocks,I assume.
Could be a loose shock bolt,loose sway bar bushing or end link bushing
Is the tail pipe touching the frame?
When it cools,wiggle the tail pipe forcefully up and down.
Crawl under there and inspect both rear shock absorber mounts and sway bar bushings and mounting bolts.
if it LOOKS good,have someone bounce the rear of the truck when you are nearby. Hear the noise? left side or right side?
Posted on Jan 19, 2013
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Posted on Jan 02, 2017
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.
Posted on Dec 30, 2008
I don't know if you already fixed it, but I had the same problem on my 03 yukon, TysonRicky is right. In my case it was the blower control module. You can find it right under the glovebox. It cost me close to $100 for a new one, but very easy to replace. Can't even imagine how much it would've cost me if I had a mechanic do it.
Posted on May 19, 2009
Mark your drive shaft coincidenly with the rear axle and tranny. Remove drive shaft. Press out the old u joints and press in the new. You will need a torch for heat and a lot of patience. Have fun!
Posted on Jun 20, 2009
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