Rear Air Ride Random Drops / Air Blending Door

[myrddin]

OK, I just got off the phone with a Hummer tech; he knew quite a bit and had some good info to offer. He says if i have the code 711 it could be that I need the update and it might be ok... However he said the 2003 suffers from having a bad system... he says the new dual compressor fixed all the problems... He says that the single failed in many ways but the most common was corrosion build up or debris that causes the exhaust valve to hang and leak air... he stated that sometimes it could not hang because the decree would move but then it might end back where it hangs up the valve... but he said if I want to test it I can remove the gas cap, and then remove the filler neck surround ( 3 screws and turn counter clockwise) and move the filler neck to the side I will see the filter and exhaust line... he says easiest thing to do is place a condom over the filter for the exhaust hose and let it sit and if I see air fill it up overnight I will know that it how the air is escaping.

So now I have another thing to test...

He did say the code read would be 50/50 but the fix now or later will be the upgraded compressor... like 2500.00 worth of parts.... that I do not have at the moment.

what do you guys think?