Can a 1995 Chevy Blazer fuel pump work on 1999 Blazer?

It's *possible*, but not guaranteed. While both are Chevy Blazers, there were changes in fuel system components between 1995 and 1999. The fuel pump itself might be physically compatible (same connector, etc.), but the internal specifications (pressure, flow rate) might differ. Using an incorrect pump can lead to poor fuel delivery, engine issues, or even damage.

To be certain, you need to check:

* Fuel pump part numbers: Compare the part number of the 1995 pump with the correct part number for a 1999 Blazer from a reputable parts supplier (like AutoZone, Advance Auto Parts, etc.). If the numbers match, it's a much better bet.

* Fuel pressure specifications: The 1995 and 1999 Blazers may have different fuel system pressures. An incorrect pressure can damage the fuel injectors or cause engine problems.

* Electrical connector: Make sure the electrical connector on the 1995 pump is identical to the connector on the 1999 Blazer.

In short, while a direct swap *might* work, it's risky. It's best to get a fuel pump specifically designed for a 1999 Chevy Blazer to avoid potential problems. The small cost savings of using an older pump are far outweighed by the potential for costly repairs if it fails.