2019 GMC Acadia Coolant Capacity & Type

The 2019 GMC Acadia cooling system typically holds between 7.0 to 10.0 quarts (6.6 to 9.5 liters) of coolant, depending on the engine and specific configuration.

Quick Answer

• Total Cooling System Capacity: 7.0 - 10.0 quarts (6.6 - 9.5 Liters)
• OEM Coolant Spec: Orange/Dex-Cool, Organic Acid Technology (OAT). Meets GM Standard DEX-COOL (GM6277M).
• Mix Ratio: 50/50 prediluted or 50% concentrate / 50% distilled water.

Capacity by Engine Option

The coolant capacity for your 2019 GMC Acadia can vary by engine:

Always refer to your owner's manual for the most accurate and specific capacity for your vehicle.

Flush Interval

Maintaining your coolant is crucial for the longevity of your engine. The recommended flush interval for a 2019 GMC Acadia using Dex-Cool coolant is typically:

• Normal Duty: Every 5 years or 150,000 miles, whichever comes first.
• Severe Duty: If you frequently tow, drive in extreme temperatures, or in dusty conditions, consider reducing the interval to 3 years or 45,000 miles.

Regularly check your coolant level and condition between flushes.

How to Refill & Bleed

Refilling and bleeding your Acadia's cooling system properly is essential to prevent air pockets, which can lead to overheating. Here's a general procedure:

1. Safety First: Ensure the engine is completely cool before starting. Wear appropriate safety gear.
2. Drain the System: If performing a full flush, drain the old coolant from the radiator drain petcock and/or lower radiator hose. Ensure proper disposal of used coolant.
3. Flush (Optional): If performing a flush, run distilled water through the system until it runs clear. Some systems may benefit from a chemical flush product, but always follow product instructions carefully.
4. Close Drain Points: Reinstall the radiator drain plug and reattach any hoses.
5. Refill: Slowly add the recommended 50/50 Dex-Cool coolant mix to the coolant reservoir/surge tank until it reaches the cold fill line.
6. Bleeding Air:
   • Start the engine with the heater set to maximum heat and the fan on low. Leave the coolant reservoir cap off.
   • Allow the engine to reach operating temperature. As the thermostat opens, the coolant level may drop. Add more coolant as needed to maintain the "cold fill" line.
   • On some Acadia models, there may be a bleed screw on or near the thermostat housing or an upper radiator hose. Open this screw slightly (if present) to release trapped air until a steady stream of coolant emerges, then close it.
   • Rev the engine gently (around 2,000-2,500 RPMs) in short bursts to help dislodge air. Be careful not to let the engine overheat.
   • Watch for bubbles coming out of the reservoir. Continue this process until no more bubbles appear.
7. Final Check: Once the engine is cool, recheck the coolant level and top off if necessary. Keep an eye on the coolant level over the next few drive cycles.

If you are uncomfortable with this procedure, it is always best to consult a professional technician.

Common Cooling System Issues

Owners of the 2019 GMC Acadia, like other vehicles of its generation, might encounter some common cooling system issues:

• Water Pump Leaks: Water pump failures, often indicated by coolant leaks or an audible grinding noise, are not uncommon. Regular inspection for leaks around the pump shaft is advisable.
• Thermostat Issues: A faulty thermostat can lead to the engine running too hot (stuck closed) or failing to reach operating temperature (stuck open), impacting fuel economy and emissions.
• Coolant Leaks: Leaks can occur from various points, including hoses, radiator end tanks, the coolant reservoir itself, or around hose clamps. A sweet smell and colored puddles under the vehicle are typical signs.
• Degraded Coolant: Over time, coolant can break down, losing its anti-corrosion and heat transfer properties. This can lead to sludge formation and accelerated wear on cooling system components.
• Radiator Problems: Obstructions, corrosion, or damage to the radiator fins can reduce its efficiency, leading to overheating. Internal clogs can also restrict coolant flow.

Addressing these issues promptly can prevent more serious engine damage.

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