DORMAN 742-122 Power Window Motor Installation Guide

DORMAN 742-122 Power Window Motor

Product Information

• Specifications
  • Product   Name: Window Lift Motor
  • Part Number: 742-122
  • Compatible Vehicles: Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, GMC Yukon

Product Usage Instructions

• Removal Instructions
  • Gain access to the window regulator assembly by removing the interior trim panel.
  • Gently pry around the plastic mirror trim piece and remove it.
  • Gently pry around the handle bezel and remove the bezel.
  • Gently pry around the switch and remove the switch.
  • Disconnect electrical connections to the switch.
  • Gently pry around the door lock bezel and unsnap it from the door panel. Unclip from the door lock rod and remove it.
  • Using a 7mm socket, remove the 3 highlighted screws.
  • Lift the trim panel and remove it from the door.
  • With the interior panel removed, peel back the plastic water barrier enough to be able to remove the regulator. Do not damage or discard the plastic barrier, it will need to be reinstalled.
  • Reconnect the window switch electrical connector.
  • Move the window into a position where you can access the 10mm bolts that hold the window guide clamps.
  • Loosen the 10mm window guide bolts enough so that the window can be separated easily from the clamps. Do not remove the bolts or loosen them all the way. The window glass needs to be supported by the clamps until the glass is secured.

FAQs

• Q: Do I need special tools to install the window lift motor?
  • A: Yes, you will need tools like a 7mm socket for the removal and installation of the window regulator and motor assembly. Safety glasses are also recommended.
• Q: Can I install the window lift motor myself if I don’t have experience?
  • A: It is recommended to seek the services of a qualified technician if you do not have a service manual or lack the skill to install this part. Always follow all instructions carefully and pay attention to cautions and warnings.

ATTENTION: Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part. If you do not have a service manual or lack the skill to install this part, it is recommended that you seek the services of a qualified technician. Pay special attention to all cautions and warnings included in the shop manual. Read and follow all instructions carefully.

REMOVAL/INSTALL OF WINDOW LIFT MOTOR (742-122) Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, GMC Yukon, Chevrolet Silverado, GMC Sierra 2000–05

General Tech Tips

• Use painter’s tape rather than duct tape to secure the window. It will not damage paint or leave a sticky residue.
• A plastic pry tool is useful. It will not easily damage delicate trim like a screwdriver or metal pry bar.
• The replacement regulator should have a liberal amount of grease on the slide area. If there is not much grease present, white lithium grease works well to lubricate the slide area.
• Aftermarket window tinting can cause the window to travel slower and put additional strain on the window regulator assembly.
• Window run channels should be cleaned and lubricated before the installation of a new window regulator assembly. Silicone spray works well.

Tools required for removal

Tools required for removal and installation of a window regulator and motor assembly:

• Phillips screwdriver
• Pry bar with fl at end
• 7mm socket
• 10mm socket
• Socket wrench
• Wooden wedge or wide tape
• Silicone spray lubricant

PLEASE WEAR SAFETY GLASSES!

Removal Instructions

• STEP 1: Gain access to the window regulator assembly by removing the interior trim panel.
  • STEP 1a: Gently pry around the plastic mirror trim piece and remove it.
  • STEP 1b: Gently pry around the handle bezel and remove the bezel.
  • STEP 1c: Gently pry around the switch and remove the switch.
  • STEP 1d: Disconnect electrical connections to the switch.
  • STEP 1e: Gently pry around the door lock bezel and unsnap it from the door panel. Unclip from the door lock rod and remove.
  • STEP 1f: Using a 7mm socket, remove the 3 highlighted screws.
  • STEP 1g: Lift the trim panel and remove it from the door.
• TEP 2: With the interior panel removed, peel back the plastic water barrier enough to be able to remove the regulator. Do not damage or discard the plastic barrier, it will need to be reinstalled.
• STEP 3: Reconnect the window switch electrical connector.
  • STEP 3a: Move the window into a position where you can access the 10mm bolts that hold the window guide clamps.
• STEP 4: Loosen the 10mm window guide bolts enough so that the window can be separated easily from the clamps. Do not remove the bolts or loosen them all the way. The window glass needs to be supported by the clamps until the glass is secured.
• STEP 5: Operate the switch or manually push the window into the full-up position. Secure the window in place using a wooden or rubber wedge between the door frame and the window or simply tape the window to the door frame. Be careful to use tape that does not damage the paint on the door frame.
• STEP 6: Disconnect the electrical plug from the window lift motor.
• STEP 7: Remove the six 10mm window regulator mounting bolts that secure the window regulator to the door frame.
• STEP 8: Remove the right side track.
• STEP 9: Remove the left side track.
• STEP 10: Remove the three (3) window lift motor attaching screws.
  • STEP 10a: The door is now ready for installation of the replacement part.

Installation Instructions

• STEP 1: Install the window lift motor with the three (3) attaching screws.
  • STEP 1a: Loosen window guide clamp bolts on replacement window regulator enough for clamps to easily slide over window glass.
• STEP 2: Install the left side track into the door.
• STEP 3: Install the right side track into the door.
• STEP 4: Move the window regulator into the proper position and line up the bolt holes. Install the 10mm bolts that were removed but do not completely tighten. The bolts should remain loose so that the regulator can be moved around for proper fi nal alignment.
• STEP 5: Reconnect the window lift motor electrical plug.
• STEP 6: Remove tape or wedge from the window and door frame and lower window into the window guide clamps making sure that the window is correctly seated in the guides.
• STEP 7: Operate the window lift motor using the switch and send the window to the top position making sure that it is aligned properly in the window guide clamps and is parked properly at the top of its travel. Tighten the 10mm window clamp guide bolts evenly and torque to 9 N-m (80 lb in).
• STEP 8: Tighten the six 10mm regulator mounting bolts in the following order: Bolt A, D, C, F, B, E. Tighten the bolts to 9 N-m (80 lb in).
• STEP 9: Lubricate the window run channels.
• STEP 10: Operate the window up and down using the switch making sure that the glass moves smoothly and is seated properly in the run channel.
• STEP 11: Disconnect the window switch.
• STEP 12: Reinstall the plastic water barrier making sure the wires are poking through the correct holes.
• STEP 13: Reinstall the interior trim panel.
  • STEP 13a: Starting at the top of the door frame, hang the panel on the top lip and move into place making sure that the electrical wires are pushing through the proper holes in the door panel. Make sure the door handle is properly aligned with the hole in the door panel and that the door lock rod protrudes through the correct hole in the door panel.
  • STEP 13b: Reinstall the three 7mm bolts that hold the panel to the door frame.
  • STEP 13c: Reconnect the window switch electrical plugs and snap the switch into place on the door panel.
  • STEP 13d: Maneuver handle bezel around door handle and snap into place.
  • STEP 13e: Snap the plastic mirror cover back into place.
• STEP 14: Perform a fi nal operational check of the window regulator assembly by operating the window up and down to ensure proper performance.
  • We appreciate your opinions regarding this product! Please call our technical assistant with any challenges or suggestions regarding the installation or operation of this product. 1-800-523-2492

Disclaimer

• Even though every attempt is made to ensure this information is complete and accurate, it is impossible to account for all possible circumstances or situations.
• Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do.
• Automobiles can be hazardous to work on; be sure to take all necessary safety precautions.
• Failure to do so may result in property damage or personal injury.
• Certain motor vehicle standards and performance requirements may apply to your motor vehicle (such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration).
• Be sure that your work is performed per such standards and that you do not disable any motor vehicle safety features.
• ATTENTION: Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part.
• If you do not have a service manual or lack the skill to install this part, it is recommended that you seek the services of a qualified technician.
• Pay special attention to all cautions and warnings included in the shop manual. Read and follow all instructions carefully.
• ©2011 Dorman Products, Inc.
• No reproductions in whole or in part without prior written approval.

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