Power Window Does Not Lower Below Door Sash or Window Does Not Index Properly When Opening and Closing Door (Recalibrate Both Driver and Passenger Door Modules)

Some customers may comment that the power window does not lower below the door sash when using either the express open or the manual mode. Others may comment that the window does not index properly when opening or closing a door.

These conditions may be caused by an anomaly in the window regulator software that causes a loss of window position counts. The loss of counts may lead to a window that does not lower fully into the door or may cause the window to not index properly.

Important: The door module calibration update procedure below can only be performed one time on each module. After a calibration update procedure has been performed on a vehicle, the option to perform the calibration update will no longer be available for that vehicle. If the calibration update option is not available when the Tech 2® (with Tech 2® software version 27.004 or newer) is connected to the vehicle, the door modules have the latest software calibration and no further updates are required.

A revised calibration has been developed to address these conditions. Technicians are to recalibrate the driver and passenger door modules, using a Tech 2® (not SPS), to address these conditions. Use the following procedure to perform the calibration updates:

1. Update the Tech 2® to software version 27.004 or newer if necessary.
2. Recalibrate the driver and passenger door modules using a Tech 2®. Use the following diagnostic path to perform the calibration updates.

2005-2007 Chevrolet Corvette

•	When recalibrating the Corvette door modules, build ALL the vehicles in the Tech 2® using 2007 as the model year.

•	Enter diagnostics > Select Model Year (Use 2007 for all vehicles) > Select Passenger Car > Select Make (Chevrolet) > Select Vehicle (Y) > Select Body > Select Driver Door > Select Module Set Up > Select Recalibration > Select Passenger Door Module > Select Module Set Up > Select Recalibration

•	The calibration update for both door modules is now complete.

3. Reinitialize (re-normalize) both the driver and passenger power windows. Refer to the Power Window Reinitialization procedure in SI. Use the Tech 2® to monitor the door module data that will show the windows have been reinitialized (re-normalized).

Important: Recalibrating the door modules with the procedure above may cause the vehicle to lose the door mirror personalization settings. Please advise the customer of this so that they can personalize their door mirrors.

For vehicles repaired under warranty, use: