To be sure, you need to:
* Check the part numbers: Find the part number of the fuel pump from the Blazer and compare it to the correct part number for your '96 S-10. You can find these numbers on the pump itself or through a parts catalog using your Blazer and S-10's VINs.
* Compare specifications: Even if the part numbers are similar, the flow rate and pressure should be identical or very close. A significant difference can damage your fuel system.
* Examine the electrical connector: The electrical connector must be physically compatible. A simple visual comparison is usually enough here.
Without verifying these points, it's risky to assume compatibility. Using an incorrect fuel pump can lead to poor performance or even damage your vehicle.