The best practice for Grande suspension lift is needed

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Hi from Russia,
I have a TLC 120 V6 with rear air suspension and electronic controll system. The target is to lift the suspension upto 2". So, I need an advise, how to do it better and avoid stupid mistakes as well. Could You give me an exact action list based on Your best practice.
Thanks.

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This has been covered in these forums a few times. Including how to do it.

Please use the search button to find the information.