Manufacturer communication — 2006 GMC YUKON DENALI XL

• 2014 and prior GM passenger cars and trucks.

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  Models: 2014 and Prior GM Passenger Cars and Trucks

Repair

• Top Tier detergent gasolines are preferable where available; they help keep the fuel injectors and intake valves free of deposits.

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  Top Tier Fuels - Some fuel manufacturers provide gasoline advertised as TOP TIER DETERGENT GASOLINE. These fuels are preferable when and where available. They help to keep your fuel injectors and intake valves free of deposits.

Parts

• The only fuel additive approved by GM is GM Fuel System Treatment Plus, P/N 88861262 (12 oz) or 88861013 (20 oz); in Canada P/N 88861012.

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  The only fuel additive currently approved by GM is GM Fuel System Treatment Plus, P/N 88861262 (12 oz) or 88861013 (20 oz) (in Canada, P/N 88861012).

Caution

• Never put kerosene or diesel fuel in a gasoline engine vehicle; it may cause inconsistent performance and permanent damage not covered by the New Vehicle Warranty.

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  Notice: Never put Kerosene or Diesel Fuel in your Gasoline Engine vehicle. This may result in inconsistent performance and permanent damage to your vehicle that is not covered by your New Vehicle Warranty.

• Never use acetone, ketone or methanol additives; some of these solvents may damage or corrode the fuel system.

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  Notice: Never use acetone, ketones, or methanol additives in your vehicle. Some of these solvents may damage or corrode your fuel system.

• GM vehicles do not require additional engine oil additives; some additives may harm the internal seals and void the warranty.

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  Notice: GM Vehicles DO NOT require additional engine oil additives. Some additives may cause harmful effects to the internal seals and additionally void the terms of your vehicles New Car Warranty.

• Gasoline engines not designated for E85 are designed for fuel with no more than 10% ethanol; more than 10% can cause driveability issues, service engine soon indicators and increased fuel system corrosion.

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  All other gasoline engines are designed to run on fuel that contains no more than 10% ethanol. Use of fuel containing greater than 10% ethanol in non-E85 designated vehicles can cause driveability issues, service engine soon indicators as well as increased fuel system corrosion.

• Higher octane fuel in a vehicle that only requires regular unleaded will neither increase performance nor improve gas mileage.

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  Using higher octane fuels in a vehicle that only required regular unleaded fuel will neither increase performance nor improve gas mileage.