Question about 2003 GMC Yukon Denali

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My autoride is not working and I can't figure out which fuse to check.

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I'll bet it's NOT the fuse...these are notorious for bad shocks...look to spend upwards $800+ to fix (check with AutoZone/NAPA parts counterperson for aftermarket fixes from Monroe. The fuse is in the engine bay under a black plastic box atop one of the fenderwells...labels for the fuses are on the underneath of the lid of the box.
Good Luck

Posted on Jun 14, 2009

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My autoride suspension is not working


A ton of things could be wrong with your autoride system. If you have more than about 70k miles and haven't replaced the rear shocks ($500+ EACH!!! at the dealer), then they are probably leaking out. If they leak out, then the air compressor will always run. Eventually the air compressor/ride level sensor module (located on the driver side rear wheel on the inboard side of the frame, $300+ at the dealer) burns out because it's not designed to run at 100% duty cycles. After the air compressor burns out, the Electronic Stability Control module (in an XL, located inside the passenger side rear wheelwell trim, next to the third row seat, $300+ at the dealer) will probably short out. If your autoride isn't working and you don't get a "Service Stability" message, your ESC module is probably going bad.

It is possible to convert to regular shocks, but to keep the Stability Control (still has to control your brakes and front variable dampening shocks during "evasive" maneuvers), you have to insert some 1/4 watt resistors in to the ride height sensor connectors (can't remember what values, but I'm sure you can Google that) so that the Stability system doesn't throw a code. Not that it matters, but the message can get annoying if it's always there to nag...

My dealer quoted over $2500 to replace the entire system. I figure I can find the control modules from my local junkyard for $300, and the shocks from ebay for $350 for the pair. Be sure to match all of the GM part numbers, and keep an eye out for an upgraded Air Compressor module - GM released an update that is heavier duty and more water-resistant than the first design. I don't remember the part number, but my dealer included the upgrade with my quote.

Oh, and the only "easy" way to test the modules is with a Tech 2 tool. Otherwise it's lots of testing with a 12-volt source and a couple of multimeters and oscilliscopes...

Good luck!

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