2017 GMC Yukon Fluid Type Specs Guide

As an ASE-certified master technician, I've compiled this comprehensive fluid specification guide for your 2017 GMC Yukon. Adhering to manufacturer specifications is crucial for the longevity and optimal performance of your vehicle. Always verify the latest specifications in your owner's manual or OEM service information, as details can sometimes vary by specific trim or build date.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SN Plus/SP, GM dexos1 Gen2 (or newer)	8 quarts (6.7 liters) with filter
Engine Coolant	Dex-Cool (Orange), GM 6277M	Approx. 16.7 quarts (15.8 liters)
Transmission Fluid	DEXRON-VI	11.8 quarts (11.2 liters) for overhaul
Transfer Case	DEXRON-VI (Autotrac II fluid for 2-speed transfer cases)	1.5-2.0 quarts (1.4-1.9 liters)
Front Differential	SAE 75W-90 Synthetic Axle Lubricant, GM Part No. 88901297	Approx. 1.25 quarts (1.2 liters)
Rear Differential	SAE 75W-90 Synthetic Axle Lubricant, GM Part No. 88901297	Approx. 2.0-2.5 quarts (1.9-2.3 liters)
Brake Fluid	DOT 3 (GM Part No. 88862806)	As needed
Power Steering	DEXRON-VI	As needed
Washer Fluid	GM Optikleen or equivalent, commonly blue ethanol-based	Approx. 1 gallon (3.8 liters)

Engine Oil

For the 2017 GMC Yukon, the factory-specified engine oil is SAE 0W-20. It must meet API SN Plus or API SP standards and, critically, carry the GM dexos1 Gen2 (or newer) approval. Dexos1 is a proprietary General Motors engine oil specification designed to provide enhanced protection against issues like low-speed pre-ignition (LSPI) and turbocharger deposits, which are particularly relevant for direct-injected and turbocharged engines (though the 2017 Yukon primarily uses naturally aspirated V8s, the specification is still mandatory). Using an oil that does not meet the dexos1 specification can lead to reduced engine life and may void your powertrain warranty.

The typical oil capacity for the 5.3L and 6.2L V8 engines found in the 2017 Yukon is approximately 8 quarts (7.6 liters) when replacing the filter. Always check your dipstick after an oil change to ensure the correct level.

Intervals: GM generally recommends an oil change interval based on the Oil Life Monitoring (OLM) system, which can extend intervals up to 7,500–10,000 miles under ideal driving conditions. However, for severe service (frequent short trips, towing, extreme temperatures), it's wise to consider more frequent changes, typically every 3,000-5,000 miles or every 3-6 months.

Common Pitfalls: Never use an oil that isn't dexos1 approved. While other oils might have the correct viscosity, they lack the specific additive package required for GM engines. Mixing different viscosities or non-specified oils can compromise engine protection.

Engine Coolant

The 2017 GMC Yukon uses GM Dex-Cool extended-life engine coolant. This is an Organic Acid Technology (OAT) coolant, typically identifiable by its distinctive orange/pink color. The GM specification number for Dex-Cool is GM 6277M. It's crucial to use only Dex-Cool or an exact equivalent that explicitly states compatibility with Dex-Cool and meets the GM 6277M specification.

Total cooling system capacity is approximately 16.7 quarts (15.8 liters).

Intervals: Dex-Cool is designed for long service intervals, typically up to 5 years or 150,000 miles, whichever comes first. However, it's good practice to inspect the coolant level and condition periodically.

Common Pitfalls: Mixing Dex-Cool (OAT) with conventional green (IAT) or even some hybrid coolants (HOAT) can lead to chemical reactions that cause gel formation, corrosion, and severe damage to the cooling system and engine. Always flush the system thoroughly if switching coolant types, though it is highly recommended to stick with Dex-Cool. Never use "universal" coolants unless they specifically state compliance with GM 6277M.

Transmission Fluid

The automatic transmission in your 2017 GMC Yukon requires DEXRON-VI (6). This is a low-viscosity, performance-enhancing fluid designed for modern GM transmissions. Using any other type of fluid can lead to premature wear, poor shift quality, and transmission failure.

The transmission overhaul capacity is approximately 11.8 quarts (11.2 liters), but a drain and refill typically replaces only a fraction of this, as much fluid remains in the torque converter and cooler lines. A full fluid exchange (flush) is usually required to replace nearly all the fluid.

Intervals: GM generally specifies transmission fluid changes based on vehicle usage. For normal service, intervals can be as long as 97,500 miles. For severe service (heavy towing, frequent city driving, hot climates), it is highly recommended to change the fluid every 45,000 miles.

Common Pitfalls: Never use older DEXRON types (like DEXRON-III) in a transmission designed for DEXRON-VI. Despite the similar naming, they are not interchangeable. Using a universal ATF that doesn't explicitly state DEXRON-VI compatibility is also a significant risk.

Transfer Case Fluid

For 2017 GMC Yukons equipped with a 4WD or AWD system, the transfer case fluid specification depends on the exact transfer case model. Most Yukons with a single-speed transfer case will use DEXRON-VI automatic transmission fluid, the same as the main transmission. However, some heavy-duty or specific configurations might use a two-speed transfer case (Autotrac) which requires Autotrac II Fluid (GM Part Number 88901289 – blue in color). Always verify in your owner's manual for the specific fluid type given your transfer case.

Capacity typically ranges from 1.5 to 2.0 quarts (1.4-1.9 liters).

Intervals: Transfer case fluid generally has a longer service interval than transmission fluid unless subjected to severe conditions. Refer to your owner's manual, but intervals often range from 50,000-100,000 miles or sooner for heavy use.

Common Pitfalls: Using the wrong fluid type in the transfer case can lead to premature wear and failure. Ensure you identify the correct transfer case type before servicing.

Differential Fluid (Front & Rear)

Both the front and rear differentials in the 2017 GMC Yukon typically require SAE 75W-90 Synthetic Axle Lubricant. GM specifies their own part number, which is GM Part No. 88901297 or an equivalent meeting GM specifications. This is a full synthetic gear oil.

For vehicles equipped with a limited-slip differential (LSD), ensure the fluid either already contains a friction modifier or that you add the specified GM friction modifier (GM Part No. 88900330) during the service. Not all Yukons came with LSDs, so check your vehicle's RPO codes or owner's manual.

Front differential capacity is approximately 1.25 quarts (1.2 liters). Rear differential capacity ranges from approximately 2.0-2.5 quarts (1.9-2.3 liters), depending on the axle size and configuration.

Intervals: Differential fluid change intervals are generally quite long under normal driving conditions, often exceeding 100,000 miles. However, for vehicles that frequently tow, carry heavy loads, or drive in extreme heat, changing the fluid every 45,000-50,000 miles is a prudent preventative measure.

Common Pitfalls: Using conventional gear oil instead of synthetic can lead to reduced protection and premature wear. Incorrectly overlooking the need for an LSD friction modifier on applicable axles will cause chatter and inconsistent limited-slip operation.

Brake Fluid

The 2017 GMC Yukon utilizes DOT 3 brake fluid. GM generally specifies their own branded fluid, such as GM Part No. 88862806, or an equivalent that meets DOT 3 standards. It's a glycol-based fluid.

Capacity: As needed to maintain the reservoir level and during bleeding procedures.

Intervals: While many manufacturers do not list a strict interval, brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to internal corrosion of brake components. It's good practice to flush and replace brake fluid every 2-3 years or 30,000-50,000 miles, especially in humid climates.

Common Pitfalls: Never mix different types of brake fluid (e.g., DOT 3 with DOT 4, or any with DOT 5 silicone fluid). Doing so can cause seal damage and brake failure. Always use fresh fluid from a sealed container, as opened containers can absorb moisture from the air.

Power Steering Fluid

For the 2017 GMC Yukon, the power steering system uses DEXRON-VI automatic transmission fluid. This is a common specification for many modern GM vehicles, simplifying fluid inventory.

Capacity: As needed to maintain the reservoir level.

Intervals: Power steering fluid is often overlooked. While not always a scheduled maintenance item, if the fluid appears dark, contaminated, or if you notice steering noise, a fluid flush can be beneficial. Intervals could range from 50,000-100,000 miles or if issues arise.

Common Pitfalls: Using the incorrect fluid type can lead to pump noise, premature wear, and steering system component failure. Always use DEXRON-VI.

Washer Fluid

Any commercially available windshield washer fluid from a reputable brand suitable for automotive use is acceptable. GM often recommends their GM Optikleen washer fluid concentrate or an equivalent. These are typically ethanol-based and often dyed blue.

Capacity: The washer fluid reservoir holds approximately 1 gallon (3.8 liters).

Intervals: As needed, whenever the reservoir is low.

Common Pitfalls: Never use plain water in your washer fluid reservoir, especially in freezing temperatures, as it can freeze and damage the pump, lines, and reservoir. Some concentrated products need to be diluted correctly per manufacturer instructions.

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