2013 Denali/Suspension Help/Error Code Issue

[TheRebuilder]

Hello
I have a 2013 GMC Yukon Denali and it has a C0660-06 error code which says the exhaust valve is having problems, I want to bench test the air suspension compressor to see if I need to buy a new one or if something else is wrong other than the compressor, I checked the relays and they are all good, I just don’t know how to bench test the compressor and wanted to know if anyone could help explain how to bench test it, Thanks in advance

 

[Geotrash]

Hello
I have a 2013 GMC Yukon Denali and it has a C0660-06 error code which says the exhaust valve is having problems, I want to bench test the air suspension compressor to see if I need to buy a new one or if something else is wrong other than the compressor, I checked the relays and they are all good, I just don’t know how to bench test the compressor and wanted to know if anyone could help explain how to bench test it, Thanks in advance

You can test the compressor’s functions using a Tech2. That is the only test procedure that I’m aware of. In theory it should be possible to bench test it as you say using a wiring diagram, which I can probably dig up for you if you need it. Or, a subscription to alldatadiy.com is a good investment for these trucks anyway.

How many miles on it and what kind of shape are the airbags in?

If you need it, the Dorman replacement compressor is a quality unit.

 

[swathdiver]

 

[OR VietVet]

Welcome to the forum.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

 

[TheRebuilder]

You can test the compressor’s functions using a Tech2. That is the only test procedure that I’m aware of. In theory it should be possible to bench test it as you say using a wiring diagram, which I can probably dig up for you if you need it. Or, a subscription to alldatadiy.com is a good investment for these trucks anyway.

How many miles on it and what kind of shape are the airbags in?

If you need it, the Dorman replacement compressor is a quality unit.

If you could somehow find a diagram for it I would very much appreciate it, my gmc has 129k miles and the air shocks look like they are in pretty good condition that’s why it’s kinda weird for it to have that problem with it having kinda low miles, I used a scanner similar to the tech2 but when I tried to test out the compressor, all it said was test failed, no communication with the exhaust valve, that’s why I’m thinking of bench testing it to see if the compressor is bad or I have a wiring issue with would be a pain to fix probably.

 

[TheRebuilder]

Welcome to the forum.

Thank you
I’m happy to have found this forum, very awesome people here.

 

[TheRebuilder]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

Thank you
I’m happy to have found this forum, very awesome people here, I’ll update my profile to the truck I own when I get off work.

 

[TheRebuilder]

View attachment 398193

Thank you !
useful information, one question tho, for the “Component Testing” part, where and what do I test for the 18–45 ohms ?

 

[swathdiver]

Thank you !
useful information, one question tho, for the “Component Testing” part, where and what do I test for the 18–45 ohms ?

Terminal C and B. B is red/white power wire to the under hood fuse block.

 

[TheRebuilder]

Terminal C and B. B is red/white power wire to the under hood fuse block.

Thank you

 

[Sam Harris]

Welcome from Texas!

 

[Geotrash]

If you could somehow find a diagram for it I would very much appreciate it, my gmc has 129k miles and the air shocks look like they are in pretty good condition that’s why it’s kinda weird for it to have that problem with it having kinda low miles, I used a scanner similar to the tech2 but when I tried to test out the compressor, all it said was test failed, no communication with the exhaust valve, that’s why I’m thinking of bench testing it to see if the compressor is bad or I have a wiring issue with would be a pain to fix probably.

 

[petethepug]

The AutoRide system is really simple. Most of the time that DTC is the pump grounding / shorting out or the control module rotting out. In the XL the module is under the spare and the shorty the module is next to the spare. If your pump is silent at start up it’s likely seized from running until it overheated.

GM did not put an overload protection circuit in their pump. Arnott did and it carries a lifetime warranty as well as being less expensive.

Don’t be afraid to shop around on Amazon or anywhere else for a better price. Start with the pump and move on to the module. Look at YouTube for an easy how to for replacing it.

Keep in mind a dealer will charge the cost of buying a new pump just for diagnosis. Then they’ll charge you full retail for a GM pump without load protection with a 1-2 year warranty. They’ll get about $1k to do just the pump so look out.

 

[ieastsidechevyrider]

The AutoRide system is really simple. Most of the time that DTC is the pump grounding / shorting out or the control module rotting out. In the XL the module is under the spare and the shorty the module is next to the spare. If your pump is silent at start up it’s likely seized from running until it overheated.

GM did not put an overload protection circuit in their pump. Arnott did and it carries a lifetime warranty as well as being less expensive.

View attachment 398481

Don’t be afraid to shop around on Amazon or anywhere else for a better price. Start with the pump and move on to the module. Look at YouTube for an easy how to for replacing it.

Keep in mind a dealer will charge the cost of buying a new pump just for diagnosis. Then they’ll charge you full retail for a GM pump without load protection with a 1-2 year warranty. They’ll get about $1k to do just the pump so look out.

2013 Tahoe LTZ. Shocks replaced all the way around. Factory pump was not activating, so replaced with a Dorman replacement. Pump does not activate upon startup, but will activate under load. I replaced with a different Dorman, but still getting the same results. What do you think could be the issue?