Will this bolt directly into my truck without any modification?

Yes. This radiator mounts at the factory attachment points with no drilling, welding, or custom bracket work. Bolt-in swap.

Do I need to flush the cooling system before installing this?

Flush your system before installation to remove debris and old coolant. Use distilled water and a system cleaner if the radiator came out dirty. Fresh coolant goes in after the new radiator is sealed and pressurized.

What if this radiator doesn't match my engine size — how do I know which one I need?

VNL radiators vary by engine displacement. Verify your truck's engine code or displacement before ordering. Contact our team with your VIN or engine specs to confirm the correct part number for your configuration.