* Wiring harness: The connectors and wiring harness may not be directly compatible. You'll likely need to adapt the harness or use the harness from the 2001 truck.
* Computer (ECM): The engine control module (ECM) is specific to the year and might not work correctly with a different year's engine and harness. You'll likely need the 2001 ECM.
* Sensors: Some sensors might have different connectors or specifications.
* Exhaust system: Minor differences in the exhaust manifold or routing might require adjustments.
* Mounts: While the engine mounts *should* be similar, there's a small chance of incompatibility.
In short: It's *possible*, but not guaranteed to be a direct swap. You'll almost certainly need to do some adaptation and potentially replace parts. It's best to consult a repair manual for both years to compare the specifics before attempting the swap. Checking part numbers for key components like the ECM and sensors would be highly recommended. A professional mechanic could give you a more definitive answer based on a visual inspection.
