'Service Suspension System', 2010 Yukon Denali

[gooffeyguy]

@Joseph Garcia
I know you recently went through some problems with your autoride system and you replaced the controller. I can't remember exactly what it's called. Did you have error messages beforehand and if so, which ones?

 

[Joseph Garcia]

The part is the Active Suspension Control Module, and it did not generate any codes. My concern was the when tracking the activity of the 4 level sensors in real time while driving on rough surfaces (washboard dirt road), I did not see a corresponding change in the % damping of the four shocks. Some damping was there, but not enough, IMO. When I inspected the Module, by loosening the bolts holding it in place, the frame of the Module literally disintegrated in my hands. So, I decided to replace it.

 

[Tim907356]

Is the circuit in the shock simply a resistor, or is there some variable feedback from it, like pressure, or position?

 

[gooffeyguy]

Is the circuit in the shock simply a resistor, or is there some variable feedback from it, like pressure, or position?

Reading the post above yours suggests that there is feedback

The Autoride and Autolevel kind of work in conjuntion. The Autolevel is the air shocks and ride height sensors. The Autoride is the fluid in the shocks being softened or stiffened to give the best damping for the road conditions

 

[Tim907356]

So the connector goes to a heater then, that should be a certain resistance, if that’s the functionality.

 

[Tim907356]

So, the codes have been read, and here’s what I have:

C0660 - level control exhaust valve circuit short to ground or open circuit.

I suppose since the old shock never pumped up, they never needed to exhaust. Now the valve is frozen. Mystery solved, but problem remains…the decision to repair or replace is next.

 

[gooffeyguy]

If replacing the pump, The Dorman model has good reviews and a lifetime warranty

 

[Tim907356]

So to finalize the thread, I went back to the same guy with the $89 shocks and bought the matching compressor. Alls well now; no message and the system worked fine. So we load up the 27’ camper for a week on the road, and 5mi. out, the wife says ‘What’s that noise?’ It was the shocks evacuating. So we drove 250mi. Squatting the rear. I thought the cheap bags had blown. However, it was the cheesy littler retainer clips on the plastic manifold that holds the airlines in! A pair of pliers and some quick bends on the clips, and it’s working again.
I now know way more than I should about the ALS in my Denali!