Manufacturer communication — 2006 GMC YUKON DENALI XL

• 2013 and prior GM passenger cars and trucks, excluding all vehicles with Duramax diesel engines.

  the passage

  Models: 2013 and Prior GM Passenger Cars and Trucks Excluding All Vehicles Equipped with Duramax™ Diesel Engines

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

  the passage

  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)

• A licensed dexos 1 engine oil is identified by the dexos logo on the front label.

  the passage

  Look on the front label for any of the logos shown above to identify an authorized, licensed dexos 1™ engine oil.

Repair

• The oil specified for vehicles before the 2011 model year remains acceptable for them, but dexos 1 is backward compatible and can be used in those older vehicles.

  the passage

  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

• The correct viscosity grade is critical; always take it from the Maintenance section of the Owner Manual for the engine being serviced.

  the passage

  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.