This replacement power window regulator with motor is just what you need to get your Cadillac CTS in good shape again!

This power window regulator without motor features the following specifications:

  • LH (driver's side) REAR Door
  • Replaces dealer part numbers: 15277680
  • Direct replacement
  • Built to strict quality control standards
  • Does not include motor. Buyer will need to reuse original motor

This Cadillac CTS window regulator makes a great replacement and has substantial cost savings over a dealer unit.

WARNING:  This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

Please Note:

This window regulator is designed to work with factory style motors only.  Due to variations in aftermarket designs, replacement motors may not have the correct gear style.

Rigorously Tested

Build to strict quality standards

Highest Quality Materials

Made from the highest quality materials for extreme durability and premium performance.

Part Details

  • Operation: Power
  • Regulator Option: without Motor

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Remove the door panel (1:17)
    • Unclip the door lock tab.
    • Use a putty knife to unclip the door handle bezel from the door.
    • Pry off the access panel behind the door pull.
    • Remove the exposed Phillips screws.
    • Unbolt the door handle with you 10 mm socket and ratchet.
    • Unhook the door latch rod from the door handle.
    • Unclip the wire from the stud in the exposed bracket.
    • Use a 10 mm socket and ratchet to remove the nuts securing it and set the bracket aside.
    • Carefully peel back your water shield.
  2. step : Remove the window regulator (4:19)
    • Use a 10 mm socket and ratchet and extension to disconnect the window from the window regulator and tape it up out of the way.
    • Unbolt the window regulator and motor from your door.
    • Remove the assembly from the inside of the door.
    • Use a T30 Torx driver to unbolt the motor from the old regulator and install it on the new regulator.
  3. step : Install the new window regulator (7:29)
    • Bolt the window regulator into the door using your 10mm socket and ratchet.
    • Untape your window and carefully lower it into the window regulator.
    • Secure with your 10 mm socket and ratchet.
    • Replace the water shield.
    • Bolt the bracket back to the door with your 10 mm socket and ratchet and clip the wiring harness to the stud.
    • Hook the door handle to the latch rod and bolt that down to the door as well, using your 10 mm socket and ratchet.
  4. step : Put the door panel back on (9:27)
    • Clip the door panel back onto the door.
    • Secure the two Phillips screws and clip the access panel back in behind the door pull.
    • Clip the door handle bezel and door lock tab back on.

Tools needed for replacement:

    General Tools

  • Putty Knife

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Screwdrivers & Related

  • Phillips Head Screwdriver

  • Sockets - Metric

  • 10mm Socket

  • Torx Drivers & Sockets

  • T30 Torx Driver

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Just what I needed
Great price, and I like the warranty policy hopefully I won't need it. But just what I needed, next time I'll pay for faster shipping.
February 21, 2018
7 months ago
2003 CTS drivers side rear window regulator
Good price, arrived as promised works as advertised.
The difference is the clear and concise videos that 1A Auto has available for the installs.
I would recommend to anyone that they look for there parts at 1A Auto before any other site.
July 13, 2017
1 year ago
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Vehicle Fit

Year Make Model Description
2003-2007Cadillac CTS Cadillac CTS Rear Power Window Regulator without Motor Driver Side
2004-2007Cadillac CTS-V Cadillac CTS-V Rear Power Window Regulator without Motor Driver Side

This part replaces:

  • Dorman 740-064
  • OE # 15277680
Part #: 1AWRG00615

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(11:22 min)