What coolant does GMC Acadia use?

The GMC Acadia uses Dex-Cool, GM’s orange long-life engine coolant. In most model years it is recommended as the standard coolant and is typically used at a 50/50 mix with distilled water, with replacement intervals around five years or 150,000 miles depending on the year. Always confirm your specific year in the owner’s manual or with a GM dealer, and use Dex-Cool or a GM-approved equivalent. Do not mix Dex-Cool with traditional green coolant unless the manual explicitly allows it and a full system flush has been performed.

Coolant type and color for the Acadia

Here’s what you should know about the coolant used in the Acadia, including its color, mixing and maintenance guidelines.

Key facts at a glance

• Type and technology: Dex-Cool, GM long-life coolant based on Organic Acid Technology (OAT/HOAT depending on labeling).


• Color: generally orange, which helps distinguish it from conventional green coolant.


• Mix ratio: typically a 50/50 blend with distilled water; pre-diluted bottles are ready-to-use.


• Service interval: GM commonly recommends replacement every 5 years or 150,000 miles, whichever comes first.


• Compatibility: use Dex-Cool or a GM-approved Dex-Cool equivalent; do not mix with green or universal coolant unless the manual specifies compatibility and a proper flush is performed.


• Availability: widely sold under Dex-Cool branding by GM dealers and aftermarket brands such as Prestone and Zerex that market Dex-Cool-compatible formulas.

Adhering to the above ensures proper protection for the engine’s aluminum components and the cooling system’s seals and hoses.

How to check and replace the coolant

If you’re planning a coolant check or replacement, follow these steps to do it safely and correctly. Always allow the engine to cool completely before opening the cooling system.

1. Prepare a drain pan, disposable rags, distilled water, and the correct Dex-Cool or GM-approved coolant.


2. Position the vehicle on a level surface and open the radiator cap only after the engine has cooled to avoid scalding.


3. Place a drain pan under the radiator drain valve and open it to drain the old coolant. Collect and dispose of it according to local regulations.


4. If replacing the thermostat or flushing the system, perform a proper flush using distilled water or a dedicated cooling system flush product as per the product instructions.


5. Close the drain valve and refill the system with a 50/50 mix of Dex-Cool (or Dex-Cool-compatible coolant) and distilled water, using a funnel to avoid spills.


6. Run the engine with the heater on high to circulate the new coolant, then top off to the appropriate level after the thermostat opens.


7. Check for leaks and ensure the coolant level remains in the proper range on the reservoir; reset the service interval if your vehicle has a maintenance reminder.

Always follow the exact steps outlined in your owner’s manual, and have the work inspected if you’re unsure about flushing procedures or air pockets in the system.

Common questions about Acadia coolant

Here are quick answers to frequent questions about coolant type and maintenance for the Acadia.

Can I use universal or green coolant in my Acadia? It’s strongly advised not to mix different coolant technologies. Dex-Cool should be used, and if a different type is already in the system, consider a full flush before refilling with Dex-Cool to avoid chemical incompatibilities.

Do I need to flush the system before switching to Dex-Cool? Yes, if the existing coolant is not Dex-Cool, a complete coolant flush is recommended to prevent gels, deposits, or silicate interactions that can occur when incompatible coolants mix.

Is Dex-Cool available at local auto parts stores? Yes, Dex-Cool and GM-approved Dex-Cool-compatible formulas are widely available at auto parts stores and GM dealers. Always check the label to confirm it’s the correct type.

Summary

The GMC Acadia typically uses Dex-Cool orange long-life coolant, installed as a 50/50 mix with distilled water. Replacement intervals are generally five years or 150,000 miles. Use GM-approved Dex-Cool or equivalent and avoid mixing with non-Dex-Cool products unless your manual directs you to do so. For year-specific requirements, always refer to the owner’s manual or contact a GM service center.