GM Service Manual Online
For 1990-2009 cars only

This feature automatically lowers the window a small amount when the door is opened. Then when the door is closed, the window will automatically raise. After a power reconnect, such as battery replacement, the indexing feature will not function until the system is initialized. This procedure needs to be done for each individual window.

Once power is restored, do the following:

  1. Close the door for the window being reinitialized.
  2. Turn ON the ignition, with the engine OFF.
  3. Hold the window switch up for two seconds after the window is closed, release the switch, then hold the switch up again for two seconds.
  4. Lower the window all the way down and hold the switch down for two seconds.