* Engine Mounts: The engine mounts might be slightly different, requiring modification or the use of mounts from a 1997 Blazer.
* Wiring Harness: The wiring harnesses are likely different. You'll probably need to adapt the 1997 harness to the 2002 system, which can be a complex undertaking.
* Computer (ECM): The engine control module (ECM) is specific to the year and possibly even the specific options of the vehicle. You'll likely need the ECM from a 1997 Blazer or have the ECM programmed to match the 2002 Blazer's systems.
* Sensors and Components: There might be differences in sensors and other components that could lead to compatibility issues.
In short, while it's *possible*, it's not a simple bolt-in swap. It will require significant mechanical and electrical knowledge and potentially some fabrication or adaptation. You should thoroughly research the specific engine codes (found on the engine itself) of both the donor 1997 engine and the 2002 Blazer to ensure maximum compatibility and seek advice from experienced mechanics. A professional mechanic familiar with GM vehicles from that era would be best equipped to assess the feasibility and complexity of the swap.
