It's Lockable

When I bought the Blazer the owner didn't have a key for the back window, so after I found the part at LMC Truck I ordered one right away. Waited a week or so and the mail carrier brought the the new lock. I got right to work and installed it, put the tailgate back together and went to lock the window.
Sadly the lock came out in my hand... after taking the tailgate apart again I discovered that a little piece inside clutch called the pawl was broken and that the piece that holds the lock in place.

Back to LMC Truck and another week of waiting the new parts came in on a cold and rainy day, but today is beautiful and I had enough energy so I got it all fixed and I can now lock the back window...

        

Needed a Sexy Woman to give me a hand, but a couple of 2x4s worked well...

New Pawl, Spring, and Lock