Cadillac Escalade and other GMs - Air Suspension System and Compressor Diagnosis

Checking the Air Ride system for the 2008 Cadillac Escalade to under how it all works as well as how to check the Fuses, Compressor Relay, and the Compressor. The video goes through the basic components of the system and the conditions that need to be met in order for the compressor to come on and inflate the rear air bags.

[@Thomas_post]

Appreciate the fine detail of this video. Seriously from the bottom of my soul, thank you sir. Have an open circuit/short on my Escalade, this is going to help me a lot and make it a nice quick easy find. I studied your diagram made it easy to understand. Been working on an Escalade for awhile as a project, has the VVT and the months I’ve been working on it i had the VVT on once and couldn’t believe the difference. It’s unreal. Started with 60 codes on the OBD2 and knocked most of them out with cleaning grounds, replaced quite a few parts, well alot, and now I’m here. Codes C0711-00 Level Control Air Pressure Sensor Circuit C0660-06 Level Control Exhaust Solenoid Valve Circuit - Low Voltage/Open Last code to clear and i pray she’ll run the VVT. Night and day difference when it kicks on. Been working in it for 2 months, dozens and dozens of hours, chasing the VVT haha driven it maybe 1000 miles; only had the VVT on for 3-4 miles after cleaning a ground behind fuse box to the Body control module under brake pedal. Thanks a million guy

[@StevesDIYs]

Hey man ! Thanks and glad the video helped some 👍. Yep, I do tend to get into the details a bit too much I think lol, but most times explaining the little details helps more than just a quick overview as it can be so many different things. Sounds like you have done a ton of work to get yours back on the road again so hopefully you’ll get the last little things fixed and it will be good to go ! Thanks again and all the best ! Steve

[@thegonz7833]

How about pull off the relay and touch pin 12v 30 to pin 87 going to the pump,that should do the same thing without removing it.

[@StevesDIYs]

Hello, yep, for sure the relay could be jumped from the +12 volt pin to the pump pin to see if the pump runs when it’s still on the vehicle vs. bench testing it like I did 👍.

[@whoismob]

What are those clips called you made for jumper cables to test the compressor

[@StevesDIYs]

Hello, the little wire jumpers I used were from an old harness connector I had laying around, but I believe they sell the small blade crimp ends at the auto parts stores that you can crimp into a piece of wire to make a jumper. If I hadn’t have had these extra, I normally just take a piece of wire and expose the copper on the end, then use a short piece of shrink tubing to give it a tube jacket so it does not touch any other pins. Then shrink the tube down a little so that the pin in the connector slips up into the shrink tube and contacts the exposed wire inside. The shrink tube holds it onto the pin as well if not shrunken down too much. Hope this helps a bit and all the best ! Steve

[@paison318]

Wow, this video helped me so much! Thank you for expressing in detailed fashion. Is there a way to test the Level Control or Controller? Again, truly appreciate it!

[@StevesDIYs]

@paison318 thanks and glad the video helped some 👍. I’ve actually never had an issue with the level control sensor so I’m not sure how to test it. I would say it’s probably just a variable resistor (like the float in the gas tank that measures fuel level) so it might be possible to check the resistance with the sensor’s lever arm detached and then moved up and down…not 100% sure though.

[@paison318]

@@StevesDIYs good point. I may try that if possibly needed.