1998 GMC Sonoma Owner's Manual - Page 255

Fuels in Foreign Countries If you plan on driving in another country outside the United States or Canada, the proper fuel may be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel wouldn't be covered by your warranty. Filling Your Tank To check on fuel availability, ask an auto club, or contact a major oil company that does business in the country where you'll be driving. You can alsowrite us at the following address for advice. Just tell us where you're going and give your Vehicle Identification Number (VIN). General Motors Overseas Distribution Corporation 1908 Colonel Sam Drive Oshawa, Ontario LlH 8P7 The fuel cap isbehind a hinged door on the driver's side of your vehicle.