2002 GMC Sonoma Owner's Manual - Page 317

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. 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. The fuel cap is located behind a hinged door on the driver's side of your vehicle. Filling Your Tank CAUTION: Fuel vapor is highly flammable. It burns violently, and that can cause very bad injuries. Don't smoke if you're near fuel or refueling your vehicle. Keep sparks, flames and smoking materials away from fuel. While refueling, hang the cap by the tether from the hook on the fuel filler door. 6-7