1995 GMC Yukon Owner's Manual - Page 287

A CAUTION: Heat coming from the engine cause thefuel to expand and may force the fuel out of your tank. If something ignites the fuel, a fire could start and people could be burned. heip avoid this, To fill your fuel tank only until the automatic nozzle shuts off. Don't try to "top it off." Canadian Fuels Diesel-powered trucks are now equipped with emission control systems that require the use of diesel fuel with low-sulfur (.05% by weight) content. Both low- and higher-sulfur fuels will be available in Canada. Only low-sulfur diesel fuels are availablei n the United States. It is important that diesel-powered trucks are refueled with low-sulfur fuel. Use of fuels with higher-sulfur content will affect the function of the emission components and may cause reduced performance, excessive smoke and unpleasant odor. Cold Weather Operation Follow the instructions listed previously under the heading "What Fuel to Use.'' If you're driving in very cold temperatures and can't get a "winterized" Number 2-D that has been adapted to cold weather or a Number 1-D, you can use one gallon of kerosene for every two gallons of diesel fuel. Once you add the kerosene, run your engine for several minutes so the fuels will mix. Add kerosene only when the temperature falls below 0°F (-I 8OC), because the fuel economy of kerosene isn't as good as that of diesel fuel. NOTICE: Never use home heating oil or gasoline your diesel engine. in They can cause engine damage. In cold weather, your fuel filter may become clogged (waxed). To unclog it, warm the filter to between 32°F and 50°F (0°C to 10°C). You won't need to replace it. Water in Fuel Sometimes, water can be pumped into your fuel tank along with your diesel fuel. This can happen if a service station doesn't regularly inspect and clean its fuel tanks, or if it gets contaminated fuel from its suppliers. 6-5