Last week I got into my truck and attempted to lower my window. As I did, I heard a loud noise and the window subsequently stopped moving. I took off the inside door panel later that night to take a look around and it turned out the wire that’s part of the window regulator just tore in two. I ordered a replacement regulator from car-stuff.com and it came this week. Removal and installation this evening went without a hitch. Once of my colleagues needs to do the same thing on his car so I thought I would help by documenting the process…

Driver side window regulator replacement on a 2002 Chevy Avalanche.

1. Remove the door panel. There’s a 7mm bolt that’s exposed just under the door handle and another one that’s behind the control switches. You’ll want to remove the triangle shaped trim to the right of the window as well as the trim cover behind the door lever. Disconnect the wires from the control switches and slowly lift the door panel. There’s another connection to the speaker you have to remove, and then also the door light bulb and wire located towards the bottom of the door.

2. Next you’ll need to remove the water deflector. I’ve done this a couple times so mine came off pretty easy, but make sure you don’t rip it because you’ll need to replace it. I removed the bolt that holds the door lever. It slides off and I just let it hang there. I did end up having to cut a slit through the plastic in order to get the deflector over the door lever.

3. At this point you’ll need to raise the window all the way up. If your wire has broken like mine it should be pretty easy to do. I secured the window with blue painter’s tape. Use a lot of it and you’ll get the same strength as duct tape, but without the residue.

4. Remove the wire harness that’s connected to the window motor.

5. Loosen the two bolts on the clamps that hold the window.

6. On the Avalanche, there are a total of six bolts that hold the window regulator in place. Remove all six.

6. Once the bolts are removed you should be able to jiggle the clamps loose, collapse the window regulator in on itself, and rotate it 90 degrees in order to be able get it out from inside the door.

The failed regulator:

The new regulator:

7. Now to install the new regulator simply do everything in reverse. Before I placed it inside the door I loosened the two bolts on the window clamps. After getting it in the door, I added all six bolts back in place, and once was happy with the way everything was situated, tightened them down. At this point I also reconnected the motor’s wire harness. The window clamps were just a few inches lower than I needed them to be so I temporarily reconnected the wire harnesses back to the control switches and raised the regulator up. This was also a quick way of testing to make sure the new motor and regulator were working properly.

8. Once raised, tighten the two bolts on the window clamps.

9. Remove the tape, and test the window.

10. Replace the water deflector. I used a weather-proof plastic tape to help the membrane stick back onto the door. You should double check exactly where your door panel will go back on to make sure no tape is revealed behind it.

11. Replace the door panel.

12. Celebrate the fact that you’ve got yourself a working window again.