Many Dodge Ram trucks of that era used different coolants depending on the factory fill. Some used a traditional green ethylene glycol coolant, and some used Dexcool (a different type of coolant). Mixing different types of antifreeze can be disastrous.
To be absolutely certain, you need to:
1. Check your owner's manual: This will definitively state the recommended coolant type.
2. Look at the coolant in the overflow tank: If the color is bright orange/reddish, it's likely Dexcool. If it's green, it's likely a traditional ethylene glycol coolant.
3. Consider a coolant flush: If you're unsure, a complete coolant flush and refill with the correct type is the safest option. This removes any ambiguity and ensures you use the right coolant for your engine and prevents potential damage from mixing incompatible coolants.
Never mix different types of antifreeze. Using the wrong coolant can lead to serious engine damage, including corrosion and internal block damage. If in doubt, consult a mechanic or your local Dodge dealership.
