1. Park your truck on a level surface, turn off the engine, and allow it to cool down completely. This is important to avoid burns and injuries.
2. Disconnect the battery. This will prevent any electrical accidents from happening while you are working.
3. Drain the coolant from the radiator. You can do this by opening the drain valve located at the bottom of the radiator. Make sure to place a container underneath to catch the coolant.
4. Disconnect the upper and lower radiator hoses. Use a wrench to loosen the hose clamps and then carefully remove the hoses. Be careful not to spill any coolant.
5. Remove the radiator fan. The fan is located at the front of the radiator. Remove the bolts that hold the fan in place and then carefully lift it out.
6. Remove the radiator shroud. The shroud is a plastic cover that protects the radiator. Remove the screws or bolts that hold the shroud in place and then remove it.
7. Unbolt the radiator. There are four bolts that hold the radiator in place. Remove these bolts and then carefully lift the radiator out. Be careful not to damage the radiator fins.
8. Replace the radiator with a new one. Gently lower the new radiator into place and then secure it with the bolts you removed earlier.
9. Reconnect the radiator hoses and fan. Make sure to tighten the hose clamps securely.
10. Fill the radiator with new coolant. Refer to your truck's owner manual for the correct type and amount of coolant.
11. Reconnect the battery.
12. Start the engine and let it run for a few minutes. This will circulate the coolant throughout the system and check for any leaks.
Note: If you are uncomfortable performing this task, it is recommended to take your truck to a qualified mechanic.