My battery is dead every morning, I noticed the compressor from the air ride suspension goes on about every 5 to 10 minutes. Could this be draining my battery, can I turn it off at night?

The air ride system can be "self tested" with a GM Tech 2 scan tool, you need that done to see what is causing this problem, it could be the suspension height sensor, it could be a leaking air bag (very common) or a defective air compressor or damaged leaking air lines from the compressor to the airbags, also a very common. The airbags are good for about 75,000 miles or less if the roads you travel on are in poor condition.

It's possible you have a leak in the air suspension and the air compressor is trying to keep it aired up which is draining our battery. Disconnect the power from the air compressor for a couple of days. If your battery still goe down, then the problem is somewhere else. If you do have aleak, then the air suspension will probably be bottomed out by that time, but your battery should still be good.

It is your air ride suspension. It could be the air bags, the sensors, compressor, wires and many other things. What I did was bought an after market coil spring suspension and converted it from the air ride suspension. The air ride is lovely but costly. It is hard to diagnose that air ride suspension without spending a lot more money then you want. I suggest getting an after market converter kit, but I would make sure it has the sensor plug so that your warning light on your dash goes out....otherwise it will be on forever!

that very common on this model. I hope you have a service contract to cover this.

Remove the fuse for it, or unplug it, or turn the swich off for it.

height sensor is a sensor that control air compressor on air shock.it keep vechicle level.if height sensor senses distance between frame and suspension .it will admit air to shock by controling the air compressor.check the air shock on driver side.BESURE TO TURN OFF ELECTRICAL POWER TO AIR SUSPENSION BEFORE RAISING VECHICLE.

it is under the battery tray. remove the battery and remove the battery tray.you will see it then

hummer h2 hydraulic keeps running depleting battery.

when i used too work on them some owner did away with the air system and went too a heavy duty shock instead might be worth looking into too save some cash or even an after market air shock

It is normal for some cycling of the compressor as the ride heights change and the compressor vents and fills air springs. Info:

Air Compressor
The air compressor:

• Is not interchangeable with the rear air suspension (RAS) air compressor.
• Consists of the compressor and vent solenoid; neither are replaceable as individual items.
• Is a single cylinder electric motor driven unit that provides pressurized air as required.
• Is powered by a solid state relay, which is controlled by the air suspension control module.
• Passes pressurized air through the compressor air drier that contains silica gel (a drying agent). Moisture is then removed from the compressor air drier when vented air passes out of the system during vent operation.
• The drier may be replaced separately.
• The drier has dual ports and is not interchangeable with the RAS drier.

The vent solenoid:

• Allows air to escape from the system during venting actions.
• Is part of the air compressor cylinder head.
• Shares a common electrical connector with the air compressor motor.
• Is enclosed in the cylinder head casting, which forms an integral valve housing that allows the valve tip to enter the pressurized side of the system.
• Has an O-ring seal that prevents air leakage past the valve tip.
• Opens when the air suspension control module determines lowering is required.
• Provides an escape route for pressurized air when system pressures exceed safe operating levels.
• Has a 1792 kPa (260 psi) internal relief valve.
• Is installed with the air compressor as a unit.

Compressor Relay
A solid state relay is used in the air suspension system for compressor control. The relay incorporates a custom power metal oxide semi-conductor field effect transistor (MOSFET) and ceramic hybrid circuitry. The relay switches high current loads in response to low power signals and is controlled by the logic of the air suspension control module.
The compressor solid state relay is energized by the air suspension control module to have high current flow from the battery to the compressor motor.
Control Module
NOTE: The 4WAS control module is also used for the RAS system. The internal processor recognizes external circuitry to determine if it is installed in a 4WAS or a RAS system.
NOTE: The air suspension control module is calibrated with information from the air suspension height sensors. A new or swapped air suspension control module requires the ride height adjustment calibration process to be performed.
A microcontroller-based electronic air suspension control module controls the air compressor motor (through a solid state relay) and all system solenoids. The air suspension control module also provides power to front and rear height sensors. The air suspension control module controls vehicle height adjustments by monitoring the two height sensors, vehicle speed, a steering sensor, acceleration input, the door ajar signal, transfer case signals and the brake pedal position (BPP) switch. The air suspension control module also conducts all fail-safe and diagnostic strategies and contains self-test and communication software for testing the vehicle and related components.
The air suspension control module is interchangeable between the RAS and 4WAS system.
The air suspension control module monitors and controls the system through a 32-pin two-way connector. The air suspension control module is keyed so that it cannot be plugged into an incorrect harness. There are two sides of the harness connection to the air suspension control module. Each is uniquely colored and keyed to prevent reversing the connections.

Pressure Relief Valve
The pressure relief valve (PRV) protects the rear air suspension components by venting the system to a specific pressure in the case of a system malfunction. The system will decrease the pressure to an acceptable level to maintain vehicle height. In the normal operation mode with normal system pressure, the PRV is constantly closed and does not have any effect on the system performance or function. The PRV is replaceable without any air lines.

1. If the concern remains after the inspection, use New Generation STAR (NGS) Tester connected to the data link connector (DLC) to retrieve continuous diagnostic trouble codes (DTCs) and to execute On-Demand Self-Test diagnostics for the air suspension control module.
   • If the On-Demand Self-Test is passed and no DTCs are retrieved, go to the Symptom Chart to continue diagnostics.
   • If DTCs are retrieved, go to Air Suspension Control Module Diagnostic Trouble Code (DTC) Index in this section.
   • If the air suspension control module cannot be accessed by NGS Tester, go to Pinpoint Test A.

Self-Test
Verify that the following conditions are met before running the On-Demand Self-Test.

• All doors, liftgate, and liftgate glass must be closed.
• The transmission is in PARK.
• The BPP switch is not pressed during the test and the parking brake is not set.
• The accelerator pedal is not pressed during the test.
• The vehicle is not in 4L mode.

1. Fulfill the pre-conditions.

1. Install a battery charger for the On-Demand Self-Test to prevent battery drain.

1. Run the air suspension On-Demand Self-Test.

1. Record all listed DTCs.

1. Retrieve stored DTCs.

1. Troubleshoot any On-Demand Self-Test DTCs first.

1. Retest and clear DTCs after repairs.