Factory air ride on 02 yukon being BAD!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Marv D · 06-29-2012, 10:21 PM

Will try to NOT make this long. Wifes 02 Yukon has every piece of gingerbread they offered in 02 I think, including the air leveling / electronic shocks.
The pump works great. In fact so great that it blew the bags out of the shocks. I replaced the shocks (a nice $740 expense for the two rear shocks) and now I have to take the relay out of the system or it jacks the rear up like a stink bug. Not all at once,,, just a little 4-5 second run of the pump after you start the motor. Thing is it never RELEASES air. After a week or so it's a stink bug and the only way to get it down is to take the lines off the shocks. A week or so later it has slowly pumped it back to a stinkbug.

I've had it into the shop to the tune of about $600 in diagnosis and trouble shooting (after I installed the new $740 shocks and found 'why' it bley them up) and the 'experts' can't seem to find 'why' it won't open the 'dump' solenoid. If you activate the relay manually by grounding it, it will dump, so the solenoid works as does the valve. And it does sense a sagging suspension when a trailer is on the hitch. It pumps to level and stops. But take the trailer off and it never dumps air to let it back down.

Suposedily they have checked the sensor that reads the suspension. I can beleive it is ~OK or it wouldn't stop pumping after just a few seconds when unloaded,,, and it wouldnt pump only until level when it IS loaded, right?

The pump obviously works to make enough PSI to explode the bags in the shocks.

The tech said he checked all the connections in the chassis control module (inside the rear AC housing area) and has decided it has to be a computer fault. He wants $690 for the chassis control module, PLUS I will have to take it to a Dealer to get it flash programed for the 02???

This is getting STUPID!!!!

I have the relay out to keep it from destroying the new shocks, and / or burning up the pump.

Anyone have any experience with these things that can tell me what voltages i should be seeing at the ride height from the sensor to see if 'one side' is dead or something,, or ANY ideas where to start looking??

In a blink of an eye and throwing parts at it I could have a $2000 repair here!

Thanks for any thoughts or help

06-29-2012, 10:21 PM	#1
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Factory air ride on 02 yukon being BAD!! Will try to NOT make this long. Wifes 02 Yukon has every piece of gingerbread they offered in 02 I think, including the air leveling / electronic shocks. The pump works great. In fact so great that it blew the bags out of the shocks. I replaced the shocks (a nice $740 expense for the two rear shocks) and now I have to take the relay out of the system or it jacks the rear up like a stink bug. Not all at once,,, just a little 4-5 second run of the pump after you start the motor. Thing is it never RELEASES air. After a week or so it's a stink bug and the only way to get it down is to take the lines off the shocks. A week or so later it has slowly pumped it back to a stinkbug. I've had it into the shop to the tune of about $600 in diagnosis and trouble shooting (after I installed the new $740 shocks and found 'why' it bley them up) and the 'experts' can't seem to find 'why' it won't open the 'dump' solenoid. If you activate the relay manually by grounding it, it will dump, so the solenoid works as does the valve. And it does sense a sagging suspension when a trailer is on the hitch. It pumps to level and stops. But take the trailer off and it never dumps air to let it back down. Suposedily they have checked the sensor that reads the suspension. I can beleive it is ~OK or it wouldn't stop pumping after just a few seconds when unloaded,,, and it wouldnt pump only until level when it IS loaded, right? The pump obviously works to make enough PSI to explode the bags in the shocks. The tech said he checked all the connections in the chassis control module (inside the rear AC housing area) and has decided it has to be a computer fault. He wants $690 for the chassis control module, PLUS I will have to take it to a Dealer to get it flash programed for the 02??? This is getting STUPID!!!! I have the relay out to keep it from destroying the new shocks, and / or burning up the pump. Anyone have any experience with these things that can tell me what voltages i should be seeing at the ride height from the sensor to see if 'one side' is dead or something,, or ANY ideas where to start looking?? In a blink of an eye and throwing parts at it I could have a $2000 repair here! Thanks for any thoughts or help __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral. Last edited by Marv D; 06-29-2012 at 10:26 PM.



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