Chevrolet GMC 2002 Owner's Manual Supplement page 33

What Fuel to Use in Canada
Canadian fuels are blended for seasonal changes.
Diesel Type "A" fuel is blended for better cold weather
starting (below 0 _ F or 18 _ C); however, you may
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notice some power and fuel economy loss. If Type "A"
fuel is used in warmer temperatures, stalling and hard
starting may occur. Diesel Type "B" fuel is blended for
temperatures above 0 _ F (
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system requires the use of diesel fuel with low
(.05% by weight) content. Both low
fuels will be available in Canada. Only low
fuels are available in the United States. It is important
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that diesel powered trucks are refueled only with
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low sulfur fuel. Use of fuels with higher
will affect the function of the emission components and
may cause reduced performance, excessive smoke and
unpleasant odor.
At a minimum, the diesel fuel you use should meet
specifications CAN/CGSB
in Canada. In addition, the Engine Manufacturers
Association (EMA) has identified properties of an
improved diesel fuel for better engine performance and
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durability (FQ P 1A). Diesel fuels corresponding to the
EMA description could provide better starting, less noise
and better vehicle performance. If there are questions
about the fuel you are using, please contact your
fuel supplier.
6-4
18 _ C). The emission control
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sulfur
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and higher sulfur
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sulfur diesel
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sulfur content
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3.517 93 (Low Sulfur Diesel)
Very Cold Weather Operation
Follow the instructions listed previously under the
heading "What Fuel to Use."
NOTICE:
Never use home heating oil or gasoline in your
diesel engine. They can cause engine damage.
In cold weather, your fuel filter may become clogged
(waxed). To unclog it, move the vehicle to a warm
garage area and warm the filter to between 32 _ F and
50 _ F (0 _ C to 10 _ C). You won't need to replace it.
Additional information on the fuel filter follows.
Water in Fuel
CAUTION:
Diesel fuel containing water is still flammable.
You could be burned. If you ever try to drain
water from your fuel, keep sparks, flames and
smoking materials away from the mixture.