2008 pontiac g6 drivers window, when handle is lifted the window does not drop the inch or so that it should.

The window indexing feature is used to lower the driver and passenger power windows approximately 4 mm when the door is opened. This is necessary to allow the top edge of the window to clear the window weather-strip. This feature will also raise the window to the fully seated position once the door is closed.
Is just the driver door not working ?
Observe the operation of the driver window and front passenger window while opening and closing their respective doors. The windows should index DOWN and UP when the doors are opened and closed.
? If either window does not index UP or DOWN, refer to Window Index Feature Malfunction.

Window Index Feature Malfunction
Ignition ON, observe the scan tool Driver Door Ajar Sw and Door Ajar Switch parameters while opening and closing the driver and passenger doors, the parameter should change from Door Closed to Door Ajar.
? If the parameter does not change when opening and closing the doors, refer to Door Ajar Indicator Malfunction .
Ignition OFF, disconnect the harness connector at the appropriate window motor.
Ignition ON, with the door closed, test for greater than 10 volts between the signal circuit terminal 5 and ground.
? If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
With the door open, test for less than 1 volt between the signal circuit terminal 5 and ground.
? If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
If all circuits test normal, replace the window motor.

Your best bet mite be to take your vehicle to a qualified repair shop (GM dealer )