If the window glass is ok but the power window won't go up or down you'll probably have to have the entire regulator/motor assembly replaced. You can get it for about $100 or have it replaced for about $300 at most shops.
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Sounds like a connector is disconnected inside the driver side door. The connector is usually located near the front of the door. Removing the door panel could be a job you do not want to attempt, but the car being a 2004 you may want to try. The wiring for the door windows and locks goes through this door.
I believe you have something broken inside the door. If you remove the inside door panel and plastic cover, and take a good flashlight, try it and see if you can tell what is broken. Sounds like the regulator has broken, at least in part. Be blessed.
A master switch may be at falt, but try you may want to check power gets to window motors, remove door panels and use your test lite activate switch and see if lites Ok then needs a window motor if no your master switch is bad..
Very rarely on this year you may also found broken wires between drivers door and vehicle, where harness pass from door to inside car, disconet harnes from inside left kick panel and pull it out towars door pull black rubber boot back remove electrical tape and check all wires if any open or split repair and rechek al over. good luck
Remove any and all screws from the door panel, including removing lock and window controls. then take a large flat-tipped screwdriver and pry off the panel all the way around. FInally lift panel up and off the door. Now you will have access to the inside of the door. Everything from here is self explainable.
You'll need to remove screws that are by the door handle,
arm rest, under door and side of door and then gently pull back on the
panel as there will also be retaining clips attached and you don't want
to break them. If needed, you can pull back the weather seal
(can't reuse it, but it's not that important) and you will be able to
access everything inside the door
Can you open the door with the inside handle? If you can, the problem is probably a broken plastic fitting inside between the outside handle and the door latch. There are door panel removal tools available at your local parts store that look like short handled wide bladed pry bars. You could get by with a good stiff putty knife if needed. Take off the arm rest, window crank, and speaker grill if you have aftermarket speakers. Slide the door panel removal tool under the edge of the door panel and CAREFULLY pop the clips loose from the door frame. You could always leave the window open and do the "Dukes of Hazard" thing, but then you would have to change the paint scheme.
Pull out window crank and door handle, remove panel, remove plastic Nylon that's between metal and panel, crank the window down enough to see the arm and the part that connects with glass. Make sure the metal part inside the door that comes from an arm and attaches to glass is clean, from broken glass and the gap that attaches to window is clean,bend the new glass to make it fit inside the opening slide down the new glass from the top using opening guides, grave it from both sides standing in between and make land on top center of the part that graves the glass, put automotive glass silicone on center of that part,just at where graves the glass, let dry, put the plastic back the door panel the window crank with the "U" shaped lock washer and the door handle, I hope I was clear
When removing the door panel, you need to remove all of the screws first. Then pull the door panel off. There should be screws around the edges or the door panel, and 1-2 screw on the door handle(on the inside). Then pop the door panel off, if the blazer has electric windows and locks you have to disconect them first, if it doesnt have power locks and windows, you have to take the window crank off,there should be a screw in the center of that. Unscrew the door lock and pull up. If it doesnt have them locks then you have to disconect it from inside the door panel