tail gate
Remove the panel behind the latch then remove the clip from the lock and it comes right out, it isn't connected to any mechanism inside the tailgate.
locking mechanism is buggered.. have to unlock manually and replace
I assume you are asking about the lock cylinder. Try one of the auto parts stores. Kragen's has them, so does Autozone. I would think that others do as well.
Mine was missing the knob for opening it, I bought a new one from www.rockauto.com and replaced it, there are two to chose from, I bought the cheap one and it was a complete unit with keys. You have to remove the inner panel from the tail gate to get access to the lock then remove the clip holding it in and replace it with the new one.
The 1988 Chevrolet Blazer tailgate window motor might be bad and need to be replaced. The window motor fuse might be blown and needs to be replaced.
Inside the tail pipe.
Open the tail gate and look at were the straps that hold the tail gate are at on the sides of the bed. Now look at the 2 Phillips screws and remove them then the light will come out.
might be a fuse
recall contact Chevrolet dealer
It is on the transfur case tail shaft.
The 1985 Chevrolet have blazer tail light fuse can be found in the fuse box. The fuse box is located beneath the drivers side dashboard.