The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2018 Yukon Denali Air Ride Compressor Constantly Running - Not Leveling

0

Steve N. · rep 0 · May 22, 3:41 AM · 1 replies · solved · Question

Vehicle: 2018 GMC Yukon Denali

Hey everyone, I'm having an issue with my 2018 GMC Yukon Denali, specifically with the air suspension. Lately, I've noticed the air ride compressor seems to be running almost constantly, even when the vehicle is parked.

Despite the compressor working overtime, the rear of the vehicle often looks lower than usual, and it doesn't seem to be leveling out properly. I've tried cycling the ignition, but it doesn't make a difference. It's making me nervous about potential damage.

Has anyone experienced this with their Denali? What could be causing the compressor to run so much without the vehicle leveling? Any advice on what to check first would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:41 AM

0

ClearTheCode admin answer:

It sounds like your 2018 GMC Yukon Denali is experiencing a common issue with its air ride suspension system. The compressor running constantly without proper leveling usually points to a leak in the system or a faulty component.

Here are the most common causes and steps to consider:

  1. Air Spring Leaks: The most frequent culprit. Over time, the rubber air springs can develop cracks or pinholes, allowing air to escape. This forces the compressor to run continuously to try and maintain ride height, eventually leading to compressor burnout.
  2. Air Line Leaks: Check the plastic air lines that connect the compressor to the air springs and the control module. These lines can become brittle, crack, or get damaged, causing air loss.
  3. Faulty Ride Height Sensor: Your Yukon has sensors that tell the control module the vehicle's height. If a sensor is faulty, it might be sending incorrect readings, leading the system to believe the vehicle is too low and commanding the compressor to run constantly.
  4. Compressor Issues: While less common as a primary cause for constant running (it's usually a symptom), the compressor itself could be weak or failing to build sufficient pressure, even if it's running.
  5. Control Module Malfunction: The air ride control module could be faulty, sending incorrect commands to the compressor or misinterpreting sensor data.

When to See a Shop:

  • Immediately: If the vehicle is sitting extremely low, or if you hear a loud hissing sound indicating a significant air leak.
  • Soon: If the compressor continues to run constantly, as this will lead to premature failure of the compressor, which is an expensive component. A professional can perform a smoke test or use soapy water to pinpoint leaks and diagnose sensor or module issues. They can also check for relevant diagnostic trouble codes (DTCs) related to the suspension system, such as C0561 (System Disabled) or C0580 (Ride Height Sensor Malfunction).
Menu

Help & account