By removing it and replacing it with a bran new one.
You will need to remove the inside door panel of your Chevy truck. Remove the door handle linkage. Remove the door handle retaining bolts. Reverse the process to install the new door handle.
You will have to remove the entire door panel to get at the screws that hold the handle assembly to the panel.
Best source is LMC trucks.
You will need to remove the inside door panel, by prying outward on the door panel retaining clips. When the door panel is removed the door handle assembly will be visible. Remove the door handle retaining bolts.
try this site. http://www.jagsthatrun.com/Pages/Parts_S10-Third-Door-Handle.html
Remove the inside door panel of your 1987 Chevy. Remove the linkage from the door handle. Remove the door handle retaining bolts. The door handle will come off.
The handle bezel pops out then you can see how it unbolts.
Remove inside door handle and window crank handle, remove inside door panel, remove vent window and channel assembly, remove window.
Should have access after removing inner door panel
Bar from the handle to the latch is broken or disconnected.
Are the door interchangeable on an 1987 chevy truck and an chevy blazer 1988
maby you should Expierement on it or go ask google ok sorry.