this popped up for the first time tonite when i scanned the car (ses is always on due to various mods).

did a search and came up with multiple causes. something about the air check valve, then someone mentioned about the air pump.

well i have my AIR removed along with all the lines, and blockoffs on the fittings on my LTs. so it can't be that.

someone mentioned the valve on one of the valve covers. which is it?

thanks...

 

http://www.gearchatter.com/viewtopic8812.php

try this link if you have not already. It even has a step by step diagnosis on posibly fixing your problem.