Look for coolant that meets the following specifications:
* Dex-Cool: This is a common type of extended-life coolant often used in Dodge trucks, but confirm compatibility with your truck's manual or a Dodge dealership.
* HOAT (Hybrid Organic Acid Technology): This is another type of extended-life coolant. Again, confirm compatibility before use.
* Check your owner's manual: This is the most crucial step. The owner's manual explicitly states the recommended coolant type and specifications for your specific 2006 Dodge diesel truck model (e.g., 2500, 3500, Ram).
Using the incorrect coolant can lead to severe engine damage, including corrosion, cavitation, and even catastrophic failure. If you're unsure, err on the side of caution and consult a Dodge dealership or a qualified mechanic. They can confirm the correct coolant type and ensure proper flushing and filling.