Ford F-250 2004 Ford

Thoroughly inspect the frame and body for rust, especially if the vehicle is from a rust-belt region.

For diesel models, pay close attention to the 6.0L Power Stroke engine's history. Check for maintenance records related to EGR coolers, oil coolers, and head gaskets.

Test drive the truck under various conditions (city, highway, load if possible) to assess performance, transmission shifting, and suspension.

Have a pre-purchase inspection (PPI) done by a mechanic experienced with heavy-duty trucks, especially diesels.

Check for leaks, particularly around the engine, transmission, and cooling system.

Verify the functionality of all electrical components, including lights, power windows, and HVAC system.