When opening the doors with the side windows fully closed on all HUMMER EV models, window indexing automatically lowers the window a small amount. Once the door is closed, the window will automatically raise to its full up position. (Fig. 3)
Fig. 3
If the vehicle loses 12V battery power, such as if the battery needs to be replaced or has been disconnected, the automatic indexing feature will not operate.
Closing the Door
The doors can be opened if there is a loss of 12V battery power. However, with the indexing feature inoperative, care should be taken to not forcefully slam the door because the top of the side window will contact the sky panel and/or the front A-pillar applique. Damage will likely occur if the door is forcefully closed with the side window in the full up position. Any damage that occurs to the sky panels or A-pillar appliques would not be covered under the New Vehicle Limited Warranty.
To close a door with the side window fully raised without 12V battery power, push the top edge of the side window inward while simultaneously slowing closing the door in order to “tuck” the top of the side window underneath the A-pillar applique and sky panel. Once the side window is in place, push the door to latch it. Following this procedure will help prevent potential damage to the sky panel or A-pillar applique when closing the door.
Programming the Windows
Window programming will be necessary after replacing the 12V battery or if the 12V battery has been disconnected or discharged. If the window is unable to express-up, program each express-close window:
- Close all doors.
- Turn the vehicle on.
- Partially open the window to be programmed, and then close it and continue to pull the switch briefly after the window has fully closed.
- Open the window and continue to press the switch briefly after the window has fully opened.
DTCs B1956 55, B1957 55, B1958 55 or B1959 55 (Side Door Window Regulator Motor) will set and an “Open, then Close the Driver Window” or “Open, then Close the Passenger Window” message will display on the Driver Information Center when the Body Control Module (BCM) has detected that the window motor is not configured. In addition to 12V battery conditions, the DTCs may set if the door wiring harness or window motor has been disconnected. The DTCs will clear once the windows have been programmed, or normalized, and the indexing feature is restored.
Once the windows are indexing properly, check the front side door window glass-to-seal penetration. The glass should penetrate the seal 6–9 mm (0.23–0.35 in). (Fig. 4)
Fig. 4
– Thanks to Mark Shearer
