Service suspension system

[ukrkoz]

Hi all

I started having Service suspension system on and off on MFD.
2007 Tahoe LT, 150 000 miles, air ride equipped, electronic front shocks.
I can't find any error codes and I do have CAN BUS scanner.
Compressor kicks in every start up, as it should.
Ride is bumpy.
Spraying soapy water onto rear shocks didn't reveal any leaks.
There is water in air lines, I saw that. Rusty water.
Bellows are intact.
It is not consistent message, but most of the times at start up.

Suggestions? Thank you

 

[George B]

You need to be able to read chassis codes. It could be a bad actuator coil or ride hight sensor but without a scanner you are handicapped.

 

[ukrkoz]

Roger that. Makes sense. Any best priced capable scanner recommendation?

 

[ukrkoz]

OK, so I got C0585, which is rear left actuator circuit malfunction code.
What exactly is that? I, so far, found a spread from bad strut(?) to bad compressor. Compressor starts as it should.
What am I looking at?
Thank you

 

[George B]

See post #135

Autoride suspension help

Very good info , my 2015 LTZ @ 100,500 never hear the pump run…. Believe it’s both rear shocks and the pump, and one question on the pump is what wire connectors do I.. hot wire just to see if the pump runs…. Good forum here thanks The relay is under the hood, zip tied to the harness below...

www.tahoeyukonforum.com

 

[ukrkoz]

Sooo, it's either bad connector or bad electronics inside the shock? To be honest, I had truck up on the lift and shock extended all the way down, ripping off connector. It really surprised me, why connector wire is so short? I'll check on it. That might be the ticket. Otherwise, shock, though aftermarket, is basically brand new. I, also, have another one, still wrapped in paper.

 

[George B]

Sooo, it's either bad connector or bad electronics inside the shock? To be honest, I had truck up on the lift and shock extended all the way down, ripping off connector. It really surprised me, why connector wire is so short? I'll check on it. That might be the ticket. Otherwise, shock, though aftermarket, is basically brand new. I, also, have another one, still wrapped in paper.

“Ripping off connector”?

 

[ukrkoz]

Yes. Shock extended all the way down, bellow had no air in it and plug from compressor came out of the shock connector, as the result. That wire for it is awfully short, it barely reached the plug.

 

[George B]

Yes. Shock extended all the way down, bellow had no air in it and plug from compressor came out of the shock connector, as the result. That wire for it is awfully short, it barely reached the plug.

That electrical plug should be on the top of the shock and not with the suspension. I know on the Arnott shocks if there is no air in the bladders they will slide down the shaft and pull on the air line.

 

[ukrkoz]

It is on the top. I'll shoot picture tomorrow, it's 8 pm here. Plug is connected to wire that goes into the compressor housing area and is hidden in the insulated conduit and it BARELY reaches the connector. I tried to pull wires out more, but not really. Maybe I should release those 2 wires somehow, as they are awfully having no slack to accommodate suspension movements. Right side is fine.

 

[ivin74]

OK, so I got C0585, which is rear left actuator circuit malfunction code.
What exactly is that? I, so far, found a spread from bad strut(?) to bad compressor. Compressor starts as it should.
What am I looking at?
Thank you

How old are the shocks? If the electrical connector to the shock is on correctly the problem might be the shock and it needs to be replaced.

 

[91RS]

Yes. Shock extended all the way down, bellow had no air in it and plug from compressor came out of the shock connector, as the result. That wire for it is awfully short, it barely reached the plug.

Junk Arnott crap. Replace it with OEM and you’ll be good. If you found water in the air lines you need to replace the compressor as well.

 

[ukrkoz]

Yep, water lines spit out water.
Oh well, at 151 000 miles, that comp served well.
I'll get it replaced, been pondering that for some time.

 

[George B]

Yep, water lines spit out water.
Oh well, at 151 000 miles, that comp served well.
I'll get it replaced, been pondering that for some time.

I just replaced the compressor at the same time I did the shocks.

 

[ukrkoz]

Socks are new aftermarket.

 

[ivin74]

You need

Yep, water lines spit out water.
Oh well, at 151 000 miles, that comp served well.
I'll get it replaced, been pondering that for some time.

Best to do the compressor and the shocks at the same time. Buy OEM shocks, the Arnott compressors are good. I'm running an Arnott compressor on my suv.

If you are using aftermarket shocks they may not be sending the correct signal to the BCM and that's why you are getting the code. Chances are that's causing the ride to be bumpy.

To keep the ride from being bumpy disconnect the electrical connector and the shock is going to act like a normal shock.

 

[ukrkoz]

Yes, knowing GM, if it senses a problem anywhere, it shuts down that system. I know.

 

[ukrkoz]

OK, so it's fixed.
Was, pretty much as usual, KISS thing.
That infamous driver side shock plug came off again.
I'll zip tie it in place. Tomorrow. I'm beat, I worked 5 hrs on buddies car.