2025 GMC Acadia Fluid Type Specs

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SP, GM dexos1 Gen3	5.3 quarts (5.0 liters)
Engine Coolant	GM Dex-Cool (OAT), Orange/Red-Orange	10.5 quarts (9.9 liters)
Transmission Fluid	GM Dexron VI	9.0 quarts (8.5 liters) (initial fill, total varies)
Transfer Case Fluid	GM Dexron VI	Consult owner's manual
Front Differential Fluid	SAE 75W-90, API GL-5	Consult owner's manual
Rear Differential Fluid	SAE 75W-90, API GL-5	Consult owner's manual
Brake Fluid	DOT 4	Consult owner's manual
Power Steering Fluid	N/A (Electric Power Steering)	N/A
Washer Fluid	All-season washer fluid	Consult owner's manual

Engine Oil

For the 2025 GMC Acadia, the factory-recommended engine oil is an SAE 0W-20, meeting the API SP standard and specifically the GM dexos1 Gen3 specification. This specification is crucial as it ensures the oil is formulated to protect against low-speed pre-ignition (LSPI) and provides enhanced wear protection and fuel economy.

The typical oil capacity for the 2.5L Turbo I4 engine is approximately 5.3 quarts (5.0 liters) with a filter change. Always verify the exact capacity in your owner's manual or OEM service information, as slight variations can occur.

Intervals and Pitfalls:

• Change Interval: GMC generally recommends an oil and filter change every 7,500 miles or 12 months, or as indicated by the vehicle's Oil Life Monitoring (OLM) system, whichever comes first. The OLM system dynamically adjusts the interval based on driving conditions, so it's essential to follow its recommendations.
• Never deviate from dexos1 Gen3: Using an oil that does not meet the GM dexos1 Gen3 specification can lead to premature engine wear, LSPI events, and potentially void your powertrain warranty. Do not substitute with older dexos specifications or generic oils.
• Proper Viscosity: While 0W-20 is the standard, always confirm the recommended viscosity for extreme operating conditions or specific engine variants in your owner's manual.

Engine Coolant

The 2025 GMC Acadia utilizes a long-life Organic Acid Technology (OAT) coolant, commonly known as GM Dex-Cool. This coolant is typically orange or red-orange in color. The specification for this coolant is crucial for protecting against corrosion, freezing, and boiling.

The cooling system capacity is approximately 10.5 quarts (9.9 liters). However, this can vary slightly depending on the specific engine and cooling system configuration. Always refer to your owner's manual for precise capacities.

Intervals and Pitfalls:

• Change Interval: Dex-Cool is designed for extended service intervals, typically up to 5 years or 150,000 miles, whichever comes first. However, regular inspection of coolant levels and condition is recommended.
• Mixing Coolants: NEVER mix Dex-Cool (OAT) with conventional coolants (often green, silicate-based, or older HOAT formulations). Mixing different coolant types can lead to chemical reactions, gelling, reduced corrosion protection, and severe damage to the cooling system and engine. Ensure any top-offs or flushes are done exclusively with GM Dex-Cool or an equivalent OAT coolant that meets GM specifications.
• Air Pockets: After any cooling system service, ensure the system is properly bled to remove air pockets, which can cause overheating.

Transmission Fluid

The 2025 GMC Acadia is equipped with an automatic transmission that requires GM Dexron VI transmission fluid. This fluid is a full synthetic blend designed to provide consistent shift quality, excellent wear protection, and extended drain intervals.

The initial fill capacity for the transmission is around 9.0 quarts (8.5 liters) when servicing, but the total capacity can be higher. It's important to note that transmission fluid changes often involve a drain and fill, which replaces only a portion of the total fluid. Complete fluid exchanges typically require specialized equipment.

Intervals and Pitfalls:

• Change Interval: Transmission fluid change intervals can vary significantly based on driving conditions. For severe duty (e.g., frequent towing, heavy city traffic, mountainous terrain), GM recommends more frequent changes, often around 45,000 miles. Under normal driving conditions, the interval may be extended, but refer to your owner's manual and the maintenance schedule.
• Never Use "Universal" ATF: Using a "universal" or incorrect type of ATF can lead to transmission shudder, poor shift performance, and catastrophic transmission failure. Always use GM Dexron VI fluid.
• Check Level Correctly: Checking the transmission fluid level often requires a specific procedure, usually with the engine warm and running, and the transmission in park. Consult your owner's manual for the precise method.

Transfer Case Fluid (if 4WD/AWD)

For 2025 GMC Acadia models equipped with all-wheel drive (AWD), the transfer case typically uses GM Dexron VI automatic transmission fluid. This is specifically formulated to provide the necessary lubrication and protection for the transfer case components.

Intervals and Pitfalls:

• Change Interval: Similar to transmission fluid, transfer case fluid intervals can vary. Consult your owner's manual for the recommended service schedule, especially for severe operating conditions.
• Dedicated Fluid: While Dexron VI is used, it's critical to ensure it's the correct fluid for your specific transfer case. Using an incorrect fluid type can lead to premature wear and damage.

Front and Rear Differential Fluid

The front and rear differentials (for AWD models) in the 2025 GMC Acadia generally require an SAE 75W-90, API GL-5 specified gear oil. This viscosity and specification provide excellent protection for hypoid gears found in differentials, especially under high load conditions.

Intervals and Pitfalls:

• Change Interval: Differential fluid intervals are typically longer than engine or transmission fluids but are still critical for the longevity of the drivetrain. Consult your owner's manual for precise recommendations, particularly if you frequently tow or drive in severe conditions.
• Limited-Slip Differentials (LSD): While most Acadias may not have an LSD, if your specific trim or package includes one, it's imperative to use a gear oil that is either pre-formulated with a limited-slip additive or to add the correct friction modifier separately. Using standard GL-5 without the additive in an LSD can lead to chatter and improper operation.

Brake Fluid

The 2025 GMC Acadia will typically use DOT 4 brake fluid. This fluid has a higher boiling point than DOT 3, providing better performance under demanding braking conditions and reducing the risk of vapor lock.

Intervals and Pitfalls:

• Change Interval: Brake fluid is hygroscopic, meaning it absorbs moisture over time. This reduces its boiling point and can lead to internal corrosion of brake components. GMC often recommends brake fluid flushes every 2 years or 30,000 miles, but always check your owner's manual for the definitive interval.
• Never Mix DOT Types: While DOT 3 and DOT 4 are compatible, mixing them can degrade the performance of the higher-spec fluid. DOT 5 fluid (silicone-based) is NOT compatible with DOT 3, 4, or 5.1 and should never be used, as it can cause significant damage to the braking system.
• Sealed System: Brake fluid should always be stored in a sealed container to prevent moisture absorption.

Power Steering Fluid

The 2025 GMC Acadia is equipped with an electric power steering (EPS) system. Therefore, there is no traditional hydraulic power steering pump or fluid reservoir. This system is maintenance-free regarding fluid.

Washer Fluid

Any commercially available all-season washer fluid is suitable for the 2025 GMC Acadia. For best results, especially in colder climates, choose a fluid with antifreeze properties to prevent freezing.

Intervals and Pitfalls:

• Refill as Needed: Simply refill the reservoir when low. There is no specific service interval.
• Avoid Plain Water: Do not use plain water in the washer fluid reservoir, especially in freezing temperatures, as it can freeze and damage the pump and lines. Even in warmer climates, plain water doesn't clean as effectively as dedicated washer fluid.

DEF (Diesel Exhaust Fluid)

The 2025 GMC Acadia is powered by a gasoline engine (2.5L Turbo I4) and does not require Diesel Exhaust Fluid (DEF). DEF is only used in diesel engines to reduce nitrogen oxide (NOx) emissions.

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