Manufacturer communication — 2006 GMC YUKON DENALI XL

• 2014 and prior GM passenger cars and trucks, excluding all vehicles equipped with Duramax diesel engines.

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  Models: 2014 and Prior GM Passenger Cars and Trucks Excluding All Vehicles Equipped with Duramax™ Diesel Engines

• The dexos 1 engine oil specification replaces the previous GM specifications GM6094M, GM4718M and GM-LL-A-025 for most GM gasoline engines.

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  Important: General Motors dexos 1™ engine oil specification replaces the previous General Motors specifications GM6094M, GM4718M and GM-LL-A-025 for most GM gasoline engines.

Steps to confirm (in the document’s order)

• Only oils displaying the dexos trademark and icon on the front label meet the dexos specification.

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  Only those oils displaying the dexos♦™ trademark and icon on the front label meet the demanding performance requirements and stringent quality standards se forth in the dexos♦™ specification.

Repair

• The oil specified for GM passenger cars and trucks prior to the 2011 model year remains acceptable for those vehicles, and dexos 1 is backward compatible and can be used in them.

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  The oil specified for use in GM passenger cars and trucks, PRIOR to the 2011 model year remains acceptable for those previous vehicles. However, dexos 1™ is backward compatible and can be used in those older vehicles.

Caution

• Using the right viscosity grade is critical for proper engine performance; always refer to the Maintenance section of the Owner Manual for the proper viscosity grade for the engine being serviced.

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  Using the right viscosity grade oil is critical for proper engine performance. Always refer to the Maintenance section of a vehicle Owner Manual for the proper viscosity grade for the engine being serviced.