This is a step-by-step guide showing how to replace a window regulator on a GMT800 SUV (and probably most GMT800 trucks as well). A window regulator is what moves your window up and down. My regulator had failed, so it was time to fix it! 
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Part number: 25885879
NOTE: This is for the PASSENGER side door only. The part number for the driver side is: 25885878
This part is available from GMPartsDirect for $93.82 shipped. I got it locally for $104, but I didn’t have to wait for delivery either.
I found a regulator cheaper at PartsGorilla.com, but it was out of stock there so I grabbed it when the dealer told me they had one. Parts Gorilla always has great prices.
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The HOW-TO:
First, tape the window in place to keep it from moving or dropping during the rest of this process.
Next, follow this tutorial for removing the door panel. This is a 2001 Tahoe so the tutorial is a match. There may be differences in newer SUV’s but the differences shouldn’t be enormous.
Okay, now that the door panel is out of the way, it’s time to pull back the plastic liner that lies between the panel and the door. Rather than remove it completely, I chose to tape it up and out of the way. This saved me the hassle of removing the door handle or cutting the liner.
With the plastic out of the way, locate the electrical plug and remove it from the regulator.
Now, locate the following two bolts and loosen them to free the window from the grip of the regulator.
From here we’re just a few bolts away from removing the regulator.
Remove these six bolts.
The regulator should now be free and can be safely removed from inside the door.
Here’s the old regulator -- You can see the broken cable that caused the problem.
Here’s the new one.
NOTE: There are a couple differences in the two regulators.
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Okay, guys, work in reverse and your window should be working again in no time!
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BTW, here's a shot of how the stud now sticks out and requires a nut.
******************************
Part number: 25885879
NOTE: This is for the PASSENGER side door only. The part number for the driver side is: 25885878
This part is available from GMPartsDirect for $93.82 shipped. I got it locally for $104, but I didn’t have to wait for delivery either.
I found a regulator cheaper at PartsGorilla.com, but it was out of stock there so I grabbed it when the dealer told me they had one. Parts Gorilla always has great prices.
******************************
The HOW-TO:
First, tape the window in place to keep it from moving or dropping during the rest of this process.
Next, follow this tutorial for removing the door panel. This is a 2001 Tahoe so the tutorial is a match. There may be differences in newer SUV’s but the differences shouldn’t be enormous.
Okay, now that the door panel is out of the way, it’s time to pull back the plastic liner that lies between the panel and the door. Rather than remove it completely, I chose to tape it up and out of the way. This saved me the hassle of removing the door handle or cutting the liner.
With the plastic out of the way, locate the electrical plug and remove it from the regulator.
Now, locate the following two bolts and loosen them to free the window from the grip of the regulator.
From here we’re just a few bolts away from removing the regulator.
Remove these six bolts.
The regulator should now be free and can be safely removed from inside the door.
Here’s the old regulator -- You can see the broken cable that caused the problem.
Here’s the new one.
NOTE: There are a couple differences in the two regulators.
- The new regulator only mounts in two places on the outside rail. The middle mounting point is no longer used.
- The bottom mounts no longer use bolts but have studs pre-attached that stick through the door from inside. Be prepared for this. You’ll need M6X1.0 locking nuts and washers and they are not provided with the regulator.
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Okay, guys, work in reverse and your window should be working again in no time!
******************************
BTW, here's a shot of how the stud now sticks out and requires a nut.
