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GM Power Window Motor & Regulator Replacement Guide
Instructions for replacing the power window motor & regulator in a General Motors 2001 Pontiac Grand Prix GTP sedan.

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This guide was specifically written to assist owners of the 1997-2003 Pontiac Grand Prix GTP "W-Body" four door sedan in replacing the power window motor and regulator assembly. This set of instructions may also be useful for owners of other General Motors coupes, sedans, SUVs, trucks or crossovers.

Some of the other GM vehicles that possibly have a similar replacement procedure include the Grand Am, Trans Am, Torrent, Vibe, Solstice, Firebird, G8, G6, G5, Chevy Cobalt, GMC Savana, Buick LaCrosse, Lucerne, Cadillac CTS, DTS, STS, Aveo, Malibu, Impala, Saab 9-3, 9-5, Saturn Astra, Aura, XLR, Corvette, Sky, Escalade, Trailblazer, Tahoe, Suburban, Envoy, Yukon, Hummer H3, H2, Saturn Vue, Colorado, Silverado, Avalanche, Canyon, Sierra, Enclave, SRX, HHR, Equinox, Acadia, Outlook, Uplander, Express, Bonneville, Regal, Century, Oldsmobile Cutlass Supreme, Lumina, and Monte Carlo.

Please note that I am not a professional ASE certified auto mechanic.  I take no responsibility for any damage to your vehicle, person, pets, or property. Please proceed with caution & consult a professional if you have any doubts. Good luck!

Left Rear Window Propped Up

Right Rear Door Panel

Screw Access Hole Covers


The left rear passenger window of my 2001 Pontiac Grand Prix GTP quit working on a brutally hot South Florida summer day after I heard a loud pop. Because of a quickly approaching thunder storm, I had to remove the door panel and prop up the glass with wooden dowels.

At the time I wasn't able to take pictures so the first half of this power window motor and regulator replacement procedure guide was demonstrated on the right rear door panel. Then I switched back over to the left side to insert the new part and reattach the door panel.

To successfully complete this procedure you'll need a flat head screwdriver, a Torx T-27 screwdriver, painter's masking tape, a 10mm socket, and a ratcheting socket wrench with extension.

You can obtain an OEM GM power window motor & regulator at your local dealership. I'd recommend buying an inexpensive aftermarket part at any of the online auto parts stores or eBay.

Popping Off Plastic Covers
Torx Screwdriver
Unscrewing 2 Door Screws
Begin by prying off the small round plastic screw hole covers that are located just behind the inner handle on the door panel with a small flat head screwdriver. Then use a Torx T-27 head screwdriver to unscrew the two door panel screws. The Torx screws can be reached by putting the Torx T-27 screwdriver under the door handle and going up at slight angle.
Pulling Off Door Panel
Two Torx Screw Fell Out
Removing Rear Door Panel
The two Torx screws will fall to the bottom of the panel. Then you can grab the door handle and give it a gentle tug until you feel the plastic pop rivets start to come out. If they are very tight, you can also try using a screwdriver to pry off the  door panel at the edges but this may leave scratches on the paint or door panel. When the door panel finally pops off, try not to lose the two Torx screws that will fall to the ground. Remember that the wires going to window switch are still attached.
Power Window Switch
Switch Power Connector
Plastic Sheet & Adhesive
To remove the power window switch, use the small flat head screwdriver and insert it in between the rear of the switch and the door panel. Once the switch is out of the door panel, disconnect the power connector and put the switch to the side. Now that the door panel is completely removed, you'll see a plastic sheet glued at the edges covering the internal components.
Door Panel Removed
Plastic Cover Removed
Carefully remove the plastic cover and try to keep most of the sticky black adhesive in place so that you can securely replace it later. Under the plastic sheet you'll see a foam block tucked into the largest cavity of the door panel. Remove it by pushing down on the black retaining clip located at the top left of the Styrofoam block and pulling it towards yourself.
Styrofoam Block Insert
Foam Insert Removed
Plastic Flap Under Foam

Now locate the four 10mm bolts that are attached to the regulator. There are two of them near the top of the door panel and two at the bottom. If you connected the dots they would form a tall rectangular box. The three bolts that hold in the power window motor are near the lower corner of the panel and are in a triangle formation. Don't remove any of them just yet.

Power Window Motor
Regulator Attached To Glass
10 MM Socket & Wrench
First we need to re-attach the power window switch and lower the window down to access the two 10mm bolts that attach the plastic window clips to the metal regulator. You may have to move the window again to access the 10mm bolt on the other side. I had to use the socket wrench extension piece to remove one of the bolts, then move the window and remove the extension to access the other bolt.
2 Bolts: Glass & Regulator
Remove Both 10 MM Bolts
Regulator & Window Bolt
After you remove both of the 10mm bolts that attach the window glass to the regulator arm, manually push the window all the way up till it closes completely. Then secure it in that position by using some painter's masking tape, which won't leave any marks when you remove it later.
Lower 10mm Regulator Bolts
Two Top 10mm Regulator Bolts
3 10mm Window Motor Bolts
Now that all of the other parts and the window glass are safely out of the way, you can loosen and remove the seven 10mm bolts that secure the power window motor and regulator assembly. Disconnect the set of wires attached to the motor by using the small flat head screwdriver to pry off the retaining clip. Lift out the the old assembly by first removing the top of the regulator, followed by the bottom of the regulator and then finally the motor.
Old Window Motor & Regulator
Window Temporarily Propped Up
Temporary Wood Supports
(Now I'm moving back over to the driver's side of the car where I had to quickly stuff in towels and wood sticks to support the window while I waited for the new part to be delivered.)


Plastic Flap Taped Up
Ready For The New Part
New Motor & Regulator
After I removed all of the towels and wooden sticks, I got the new part out of the box and ready for installation. Take a moment to figure out the correct orientation of the new window motor and regulator before inserting it into the door frame. I put it in the wrong way the first time and then had to wrestle it back out and try again. It would be a good idea to add some extra lubrication to the tracks of the new part at this time. The employees at Advance Auto Parts recommended white lithium grease for this application. I've read that many window motor/regulator assemblies fail because of inadequate lubrication.
Orientation In Door Frame
Insert Window Motor First
Insert Window Regulator Next
First insert the window motor into the large opening with the flat metal mounting plate facing towards you. Then insert the top of the regulator track followed the by the bottom of it.
Tape Up Loose Window Glass
Motor & Regulator In Frame
4 10mm Regulator Bolts
Now line up the bolt holes in the regulator with the ones in the door frame and loosely attach at least two of the bolts to hold it in place. Then pull the window motor partially out of the other opening in the door frame and re-attach the power connector and plastic retaining clip. Re-insert the window motor back into the door frame, line up the 3 bolt holes, and loosely thread in the 3 10mm bolts.
3 10mm Window Motor Bolts
2 10mm Glass To Regulator Bolts
Torx Door Panel Screws & Covers
Power Motor Connector Clip
2 Regulator Bolts Attached
Window Motor & Cable
After all 7 of the 10mm bolts for the window motor & regulator are threaded in, you can securely tighten them by hand.
Motor Power Connector
Power Connector Clip Attached
Wire Loom Snapped In Place
Don't forget to re-attach the tiny plastic rivet that holds the power window motor wire loom in place as pictured in the last image in the row above this paragraph.
3 Window Motor Bolts
10mm Socket & Wrench
All 7 Bolts Tightened
Window Motor Switch Connected
Regulator At Bottom
Window Regulator Bracket
Now that the window motor & regulator are securely in place, we need to re-attach the window glass to the regulator arm. To do this we have to hook up the window switch, turn on the vehicle's accessory power, and raise the regulator halfway up to meet the window. Then remove the painter's tape from the outside of the glass and slowly lower the window until the white plastic clips rest on top of the regulator's arm.
Regulator Attachment Point
Raising Regulator To Meet Glass
Regulator & Glass Together
You may have to wiggle the window glass and regulator arm a bit to get the bolt holes in each to line up together. The left bolt hole on my new part lined up perfectly so I inserted the bolt and tightened it with just my fingers.
Holes Don't Line Up
Bolt Attaches Regulator & Glass
Tightening Regulator To Window
The bolt holes on the right side of the glass mount and the regulator arm did not line up very well so I could not insert the other OEM bolt. I went searching through my tool box for a smaller screw with a matching nut and metal washers.
Smaller Screw & Nut
Small Screw Secures Regulator
Motorcycle Chain Wax Lube
Luckily, the smaller screw fit perfectly and did just as good of a job securing the parts together as the OEM bolt did on the other side.
Lubrication Sprayed On Towel
Lubricating Regulator Tracks
Regulator Lubed
Since I still had the window switch connected, I tested out the new part and found that it went down quickly but didn't raise the window very well. Then I remembered that the old part had a waxy lubricant smeared all over the tracks and metal wires. The most suitable lubricant that I had in the garage was the "Chain Wax" lube that I use to keep the drive chain on my motorcycle running smoothly. First I soaked a paper towel with the lubricant and rubbed it all over the regulator's tracks. That didn't seem to get enough of the lubricant on the moving parts so I carefully sprayed it directly onto the regulator. After that treatment, the window would operate faster, quieter, and more smoothly than before.
Lower Plastic Flap & Insert Foam
Plastic Sheet Glued Back On
Inner Door Handle Inserted
To put everything back in place, start by lowering the plastic flap back into the large opening in the door frame and then re-insert the Styrofoam block. Then you can re-apply the large plastic covering over the entire door frame by pushing the plastic firmly into the adhesive with your fingers. To re-attach the door panel, maneuver the door handle through the top opening in the panel and also pull out the window switch power connector. Then line up the plastic rivets on the back of the door panel with the holes in the metal door frame. Gently apply pressure until you feel the plastic door panel fasteners snap into place.
Door Panel Re-Attached
Power Window Switch Connected
Switch Popped Into Place
Once all of the fasteners are snugly holding the door panel against the frame, you can re-attach the door switch to the power connector and snap it back into place. The door switch goes in with the part facing the front of the car first and then pops down with some light pressure on the metal clip at the back of the switch. To keep the Torx screws from falling into the door panel since I don't have a magnetic Torx screwdriver, I used some of the blue painter's tape to hold them in place. After the two Torx screws were fastened, I popped the plastic screw hole covers back in place and the job was done.
Screw Secured With Tape
Door Panel Screw Tightened
Plastic Screw Hole Covers Attached
For more of my vehicle maintenance updates, check out the following links: Eaton M90 Supercharger Oil Change Guide, GM Wheel Bearing Hub Assembly Replacement Guide, Pontiac Grand Prix GTP Engine Oil Change Guide, GM 3800 Series II Engine Alternator Replacement Guide, Grand Prix PCV Valve Replacement Guide, GM ABS TCS Off SES Warning Lights Troubleshooting Guide, GM A/C Condensate Drain Pipe Unclogging Guide and the K&N Air Filter Cleaning Guide.
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