* On the engine block itself: These are the most common locations. You'll typically find them on the sides of the engine block, often near the bottom. There will likely be several. Some are easily visible, others might be hidden behind components requiring some disassembly to see.
* Less common locations (possibly): While less frequent on this engine, there might be one or two on the back of the block near the transmission.
To find them accurately:
1. Consult a repair manual: A Haynes or Chilton repair manual specific to your 1997 Chevy Blazer with the 4.3L engine will have diagrams showing the exact location of all freeze plugs. This is the most reliable method.
2. Online resources: Websites specializing in automotive repair often have diagrams or photos of engine blocks, but ensure the image is for the specific year and engine.
3. Visual inspection: Carefully inspect the engine block. Freeze plugs are usually round, and relatively flat. They are typically made of metal.
Caution: Before attempting any work near or on the freeze plugs, ensure the engine is completely cool to prevent burns. Also, be aware that some may be difficult to access and require removing other parts.
Remember, working on an engine can be dangerous if you're not experienced. If you're not comfortable with this type of repair, it's best to take your vehicle to a qualified mechanic.
