1996 GMC Sonoma Owner's Manual - Page 226

- 8 6 . To provide cleaner air, all gasolines are now required to contain additives that will help prevent deposits from forming in your engine and fuel system,allowing your emisFion control system to function properly. Therefore, you should not have to add anything to the fuel. In addition, gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines maybe . available in your area tohelp clean the air. General Motors recommends that you use these gasolines if they comply with the specifications described earlier. Fuels in Foreign Countries . ( If you plan on driving in another country outside the United States or Canada, the propkr'fuel may be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text an fuel. Costly repairs caused by use of improper fuel wouldn't be'covered by your warranty. To check on fuel aviilability, an auto club, or ask contact a major oil company that does business in the country where you'll be driving.' You can alsowrite us at the following address ror advice. Just tell us where you're going and give your Vehicle Identification Number (VIN). General Motors Overseas Distribution Corporation, North American Export Sales (NAES) 1908 Colonel Sam Drive Oshawa, Ontario L l H 8P7 NOTICE: Your vehicle wasnot designed for fuel that contains methanol. Don't use it. can corrode It metal parts in your fuel system and damage also plastic and rubber parts. That damage wouldn't be covered under your warranty.