LockDoc, Help with My Door Lock Cylinders

[67RS/SSx2]

@LockDoc. My door key cylinders on the C20 in my signature are very stiff. Some times I worry I may break off my aluminum key when trying to lock/unlock. I hope to replace the door handles this weekend (if weather cooperates) and was wondering if you had any suggestions on a way and product to lube them with while I am at it? TIA!

[Chevyland]

I'm not lockdoc
But this is what I do whenever I get a truck in

Take off the door panels
Squirt wd40 on every moving part
On the locking mechanisms
As well as the window cranking mechanisms
Then inside the key hole itself
As well as up into the roller that hits the door striker

Then I move the door locking knob up and down over and over
And open and close the door
As well as cranking the windows up and down over and over
Lastly squirting a bit more wd40 in the key hole itself
And working it delicately locked and unlocked over and over

Much of this can also be done through the window opening with the windows down, between the felts

Not sure if all this is totally recommended
But it works for me
I've even been able to correct the trucks that have had stuck windows or door locks

[LockDoc]

Originally Posted by 67RS/SSx2

@LockDoc. My door key cylinders on the C20 in my signature are very stiff. Some times I worry I may break off my aluminum key when trying to lock/unlock. I hope to replace the door handles this weekend (if weather cooperates) and was wondering if you had any suggestions on a way and product to lube them with while I am at it? TIA!

The first thing I would do is to get a couple of brass keys made and quit using the aluminum one

Also, you can roll the windows down and there will be an opening at the back of the window that will allow you to see the lock mechanism inside the door, with a good strong light. You can spray penetrating oil on the lock and latch parts down through that opening.