Where is the water jacket core plug on a 1996 Chevy blazer 4.3 vortec engine?

The 1996 Chevy Blazer 4.3L Vortec engine doesn't have a single, easily identifiable "water jacket core plug" like some older engines. Instead, it has multiple freeze plugs (also called core plugs) scattered throughout the engine block. These are typically located on the sides of the engine block, sometimes near the bellhousing, and sometimes at the rear of the block.

To find them: You'll need to visually inspect the engine block, especially the areas mentioned above. They're usually round, slightly recessed metal plugs.

Important Note: Repair manuals specific to the 1996 Chevy Blazer 4.3L Vortec engine will be your best resource. These manuals will show diagrams with the exact locations of all freeze plugs. Attempting a repair involving these plugs without a repair manual is strongly discouraged, as incorrectly removing or installing them can lead to significant engine damage.