2020 Yukon 108K miles: suspension leak? And what’s that banging noise?

[Bigell]

2020 Yukon 108K miles…The air suspension kicks in while I’m idle a little too often nowadays. It runs for like 20 seconds multiple
times a day, I’m thinking it has a leaky bag or the compressor is going, and my BS warranty doesn’t cover it Also this might sound weird, but when I park my truck there’s a loud clunk coming from the rear left wheel. Almost like when parking brake disengages. Only thing is, the brake isn’t engaged at all. And it only happens when I turn the engine off. Any clue what it might be?

 

[Big Mama]

No clue on the clunk if you’re hearing it while stopped. Only thing I can think of back there is your rear AC condenser. For the leaking air you have a shock going down or a leaking fitting. The pump should only run a few seconds when key is on. Climb under and look for cracks in the rear shocks.

 

[ReaperHWK]

Spray the shocks with soapy water. If there is a leak you’ll see it like this: