This information applies to the 2008 Tahoe and Yukon Hybrid with RPO HP2.
Currently, the Tech 2 has a
software anomaly with the power steering calibration procedure. When you start
the procedure, the Tech 2 will have you rotate the steering wheel 90 degrees to
the right and then another 90 degrees to the left before centering the steering
wheel. After you perform this step and press the continue button at the bottom
of the screen, you will experience a no-communication screen.
Currently engineering is working
on new software for the Tech 2 to resolve this concern. Follow the temporary
work-around to perform the power steering calibration.
As soon as you reach the screen that advises you to rotate the steering wheel left and then right 90 degrees, immediately move the steering wheel. There is only a 2 second window to start the test or the Tech 2 will time out and display a "no communications" screen when you press the continue button. Once you make it past this screen, the rest of the test can be completed successfully.
TIP:
If you wait longer than 2 seconds (for example, the 10 seconds it takes to read
the instruction screen) the test will time out.
Addition Information:
The last screen will display the
Manufacture Enable Counter reset screen. This should be needed only if the
current counter displayed on the screen reads something other than zero.
When performing the Power Steering Calibration, it is normal for the Driver Information Center (DIC ) to read "Service Power Steering System."
- Thanks to Paul Radzwilowicz
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