Chevrolet 2006 Tahoe Specifications download pdf (Page 373)

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101

Fuel

The 8th digit of your vehicle identiﬁcation number (VIN)

shows the code letter or number that identiﬁes your

engine. You will ﬁnd the VIN at the top left of the

instrument panel. See Vehicle Identiﬁcation Number

(VIN) on page 5-108.

If your vehicle has the 5.3L V8 engine (Code Z), you

may use either regular unleaded gasoline or ethanol fuel

containing up to 85% ethanol (E85); also see Fuel

E85 (85% Ethanol) on page 5-7. In all other engines,

use only regular unleaded gasoline.

Gasoline Octane

Use regular unleaded gasoline with a posted octane

rating of 87 or higher. If the octane rating is less than 87,

you may notice an audible knocking noise when you

drive, commonly referred to as spark knock. If this

occurs, use a gasoline rated at 87 octane or higher as

soon as possible. If you are using gasoline rated at

87 octane or higher and you hear heavy knocking, your

engine needs service.

Gasoline Speciﬁcations

At a minimum, gasoline should meet ASTM

speciﬁcation D 4814 in the United States or

CAN/CGSB-3.5 in Canada. Some gasolines may

contain an octane-enhancing additive called

methylcyclopentadienyl manganese tricarbonyl (MMT).

General Motors recommends against the use of

gasolines containing MMT. See Additives on page 5-6

for additional information.

California Fuel

If your vehicle is certiﬁed to meet California Emissions

Standards, it is designed to operate on fuels that

meet California speciﬁcations. See the underhood

emission control label. If this fuel is not available

in states adopting California emissions standards, your

vehicle will operate satisfactorily on fuels meeting

federal speciﬁcations, but emission control system

performance may be affected. The malfunction indicator

lamp may turn on and your vehicle may fail a

smog-check test. See Malfunction Indicator Lamp on

page 3-45. If this occurs, return to your authorized GM

dealer for diagnosis. If it is determined that the

condition is caused by the type of fuel used, repairs

may not be covered by your warranty.

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