Adding Equipment To The Outside Of Your Vehicle; Fuel - GMC 2007 Sierra Owner's Manual

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Adding Equipment to the Outside of

Your Vehicle

Things you might add to the outside of your

vehicle can affect the airﬂow around it. This may

cause wind noise and affect windshield washer

performance. Check with your dealer before

adding equipment to the outside of your vehicle.

If your vehicle has a diesel engine, see "Diesel

Fuel Requirements and Fuel System" in the

Diesel Supplement.

For vehicles with gasoline engines, please

Use of the recommended fuel is an important part

of the proper maintenance of your vehicle. To

help keep the engine clean and maintain optimum

vehicle performance, GM recommends the use

of gasoline advertised as TOP TIER Detergent

The 8th digit of the Vehicle Identiﬁcation Number

(VIN) shows the code letter or number that

identiﬁes your vehicle's engine. The VIN is at the

top left of the instrument panel. See Vehicle

Identiﬁcation Number (VIN) on page 607.

If your vehicle has the 5.3L V8 engine (VIN

Code 0) or the 5.3L V8 engine (VIN Code 3),

you can use either regular unleaded gasoline

or ethanol fuel containing up to 85% ethanol (E85);

also see Fuel E85 (85% Ethanol) on page 491.

In all other gasoline engines, use only regular

unleaded gasoline.

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