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Hummer H2 Air Compressor

  #1  
Old 05-08-2019, 10:26 AM
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Default Hummer H2 Air Compressor



Hey everyone. I've attached a couple photos of the old compressor on my 2003 Hummer H2 and the new one I got from RockAuto.

I was planning on swapping them out today but when I dropped the old one out I noticed a lot of the fittings are different. Did I purchase the wrong compressor or is this an updated version of the previous?

I understand where the three small hoses for the two air bags and tire inflator go but I'm having a hard time figuring out the rest.
 
  #2  
Old 05-08-2019, 11:12 AM
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GM changed to a dual compressor.... so yes there are some differences. You will also need access to a Tech2 to recalibrate the height after its installed. You could probably install it and then just go to any Chevy dealer and get them to do that. They will probably not have the calibration blocks for that though. On mine I just used a pair of jack stands and then with the jack set the rear end at the correct height on the stands and then ran the calibration. The below info along with the attached PDF will be helpful.

From the GM eSI system...

The single rear air suspension compressor used on the 2003 and 2004 HUMMER H2 has been discontinued and is replaced with the dual air compressor used on the 2005 model. The dual compressor can be used to service the prior model vehicles. The Service Parts Catalog will direct you to order the new dual compressor, part no. 89060581 and indicates that you will also need inflator pipe #15117941 and intake and exhaust pipe assembly #15117942. Refer to the 2005 installation instructions contained is SI Document No. 1457105.

You may encounter a " SERVICE AIR SUSPENSION " message after replacing the Air Suspension Compressor Assembly from a single stage compressor to a dual stage compressor. The Suspension module may also have a current or history code C0660 and/or C0712.

Recommendation/Instructions:

When replacing the Air Suspension Compressor from a single stage to a dual stage. Do not SPS program the replacement module that comes with the new dual stage compressor. The new module comes preprogrammed and a trim height calibration is the only thing needed after replacement. The trim height calibration can be found in the Tech 2 scan tool under Chassis / Air Suspension / Special Functions.

Note: If a Air Suspension Control module is SPS programmed on a dual stage compressor and the following codes listed above are set, the module will have to be replaced.


This Installation section of this procedure has been revised to add a step for pressurizing the air springs as shown below:

8. Remove the support from the compressor.

Important: If the rear axle was allowed to hang unsupported, lower the vehicle far enough to allow the air spring to be manually engaged to the support on the axle tube with minimal distortion of the air spring bladder. Ensure that the air spring is fully engaged to the axle support.

9. Pressurize the air springs. Refer to Air Suspension Pressurization Procedure.

10. Perform the suspension position calibration procedure. Refer to Suspension Position Calibration.

11. Check for leaks. If a leak is found at the air supply line connections replace the air supply lines. Refer to Air Suspension Air Line Replacement.
 
Attached Files
File Type: pdf
1457105.pdf (1.89 MB, 6 views)
  #3  
Old 05-13-2019, 05:09 PM
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Another thing Iíve noticed is the holes in the new compressor donít seem to line up the same on the back side of the bracket. Is this a known issue? Should I just notch out the holes to make it fit?
 
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