I have a Denali with 101k miles. I am told that my air shocks are bad causing tire cupping. @ 1200+ for just parts, I am wondering if anyone has any experience with replacing the air shocks with an OEM or aftermarket replacement gas shock? I would think the fit would be the same,(as for a standard Yukon 4WD, and just disconnect the air compressor either via the fuse or the harness. Also, would disconnecting the air system cause the ecm to throw a code? Thanks in advance.