How to Repair the Back Window on a Buick Regal

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Sometimes broken window glass or an electric window motor requires do-it-yourself repairs. You can replace a broken or cracked back door window on a Buick Regal with some ease. Buick Regal replacement glass is available at Buick dealers and auto glass dealers. Save some money by shopping at auto salvage yards. Salvage yards often have unbroken glass from junked vehicles. If the motor has stopped working, it too can be replaced in under an hour.

Things You'll Need

  • Phillips head screwdriver
  • Socket set
  • Replacement window glass
  • Duct tape (or packing tape)
  • Replacement window motor
  • Disconnect the battery cables to avoid accidental electrical shock from power door locks and power window electrical connections. Remove the ground (black) cable first, then remove the positive (red) cable from the battery. Make sure that the rear window to be replaced is in the "up" position.

  • Remove the inner door panel from the rear door where the window is malfunctioning or where the glass is broken. Put all the screws in a safe place so that they can be used to reattach the inner door panel.

  • Lift the broken or damaged glass out of the door. Lift the replacement glass and place in the top of the window frame inside the door. Use packing or duct tape to hold the glass in place by attaching tape to the inside of the glass and stretching the tape over the top of the door frame and attaching it to the other side of the glass.

  • Use a socket wrench to remove the bolts that hold the window motor and door mount. Unplug the wiring from the old motor. Plug the wiring into the new motor. Bolt the new window motor in the place where the old motor was bolted.

  • Remove the duct tape or packing tape that was used to hold the new window glass in place. Replace the inside door cover. Reattach the battery cables to your battery by attaching the ground (black) cable first then the positive (red) cable. Turn on the car and test the new window motor.

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