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Rear window help...please

W

wheeler

1/2 ton status
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Dec 11, 2007
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New Jersey
Hi, so i just bought an 84 k5, and among other small issues, the back window does not go down. I knew when i bought it that it was a problem, but i think i got a good enought deal. The lock cylinder is missing out of the outside crank, and the crank does not feel like its making any contact. The guy i bought it from said it needed some kind of dogbone looking piece in the crank assembly, but it could be manually opened from the inside with a screw driver. Short of unbolting the regulator and removing the window, i dont see how to get the window to go down. Can someone please explain how to do this, so that i can easily get into the back. Thanks.
 
Nobody? I've searched and found tons of my Windows broke threads but nothing on how to get it open...ill take another look, see what I can find.
 
Take the rear access panel off the tailgate from inside, remove the cable from the window motor. Hook up a reversable cordless drill motor to the end of the cable and use the drill motor to roll the window up and down. Just go slow at first so you know which way your going.
 
In the case of a manual, you are going to need to get a complete outside manual crank. Either buy one from LMC or Classic Parts, or go the junkyard and find one, or look through the classifieds here. Once you have it, the steps for replacing it are as follows:

1. Open access panel
2. Remove 4 bolts holding window sash to regulator arms
3. Carefully lower window into tailgate, then open tailgate
4. Slide window up, make sure to support the window when it is extended out of the tailgate with the tailgate open
5. Unbolt the 4 bolts that hold the regulator on then move the regulator clear of the handle area
6. Remove 2 nuts holding old crank/handle on

Reverse this process to install the new crank assembly. The bulk of the crank assemblies I can find from LMC and Classic Parts, still require you to buy a lock cylinder to function. If you get one from a wrecking yard, make sure the lock is unlocked, or that you get a key for it. Any lock mechanism is going to need to be keyed to match your doors.
 
thanks lectric80, thats what i thought it would be, the guy i bought it from said that he had been opening it with a screw driver somehow...but i guess not lol. I just wanted to make sure before i removed everything and went for a new crank assembly. i am going to the junkyard tomorrow to look for one.
 
I don't think you could even open it with a screwdriver, the crank is a U shape that slots over a T shaped piece on the regulator. I don't know how you could possibly do it that way. Although, it might be possible to get a pair of needle nose pliers through the key hole and turn it that way, but if it isn't rolling smooth, it is going to be pretty hard to rotate.
 
yeah, he was saying you could go through the inside access panel and crank it down with a screwdriver. As this is my first K5, and i havent worked on them too much, i believed him...o well, im going to take the window and regulator out, and get a crank tomorrow hopefully, if the junkyard has one, they usually only have about 20 k5s.....lol
 
You could probably move it down a little, but it wouldn't be easy. Even with the access panel off, the actual point of rotation is above the steel line, so it would be difficult at best, most likely impossible.

Keep in mind, the components on the Suburban will not work on a Blazer. There is a height difference, the Burb is shorter, so you cannot use those parts. The crank is shaped differently as well.
 
wheeler said:
thanks lectric80, thats what i thought it would be, the guy i bought it from said that he had been opening it with a screw driver somehow...but i guess not lol. I just wanted to make sure before i removed everything and went for a new crank assembly. i am going to the junkyard tomorrow to look for one.
Click to expand...

Actually you can, but it's not a good idea. I had the same problem as you. I removed the lock cylinder and was able to jam an allen wrench through a small hole. The allen wrench caught on something that let the window crank up and down. This put stress on the pawl and clutch which eventually broke. So I replaced the whole thing.

It was a temporary solution to get my window up and down, but the pawl and clutch ended up costing me $25 plush shipping from LMC.

RC
​
 
OK, so i found a non-broken crank, and i dont see anything broken on the clutch piece, do i need a lock cylinder and the pawl and spring for it to work? I am ok with not having a lock on the back, more because i cant find a lock cylinder cheap...i just want my window to go up and down.
 
I believe you will have to have a lock cylinder, spring, and pawl. The lock cylinder is what actually locks the pawl into the clutch assembly to allow the crank to work. Without this it will just free spin and not crank up or down.
 
That's what it was looking like...weak...guess ill have to place my first order to lmc. If I don't get the lock keyed it should still work right?
 
I have never tried it without having it keyed, so I don't know for sure. It is pretty cheap to have a locksmith set it up for the key, and takes around an hour.
 
I know, id just rather spend money on the drivetrain and stuff than silly locks, lol I would key it if it came with pins, but they don't...o well I guess ill try it and see how it works. Thanks for all your help.
 
So i just ordered a new lock cylinder from LMC, i was a little concerned at first because my 2006 LMC catalog shows the cylinder costing 23 with no key and it is now 20 with a key... wow a price going down lol. hopefully all goes in well and my window works again. Thanks again for everyones input, definately a big help.
 
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