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Craig,
Here's one of the replies I just got to the thread over at corvette mechanic site..
There is a 'warm up' routine for the AH system. In part, there is the steering wheel position sensor (SWPS) calibration where you have to go straight for a bit. If you start out by turning, the SWPS can't calibrate and the AH will report it is warming up. This happens a lot to autocrossers that start their car at the line and the course goes into a turn or when people are backing out of their garage or a parking spot and have to turn right away.
In addition, you'll see the warming up message when it is cold out. Below 16F. And if it isn't that cold and you were driving straight, then you need to check the wiring to the Intake Air Temperature (IAT) sensor as a problem here will default to telling the car it's cold.
HTH
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2008 C6 M6 Z51 NPP /2008 CTS AWD 3.6 DI FE2
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