1995 GMC Safari Owner's Manual - Page 208

Your vehicle has a facial air bag system. Before attempting to do your own service work, see "Servicing Your Facial Air Bag-Equipped Vehicle" in the Index. You should keep a record with all parts receipts and list the mileage and the date of any service work you perform. See "Maintenance Record" in the Index. NOTICE: If you try to do your own service work without knowing enough about it, your vehicle could be damaged. Fuel The 8th digit of your vehicle identification number (VIN) shows the code letter for your engine. You will find the VIN at the top left of your instrument panel. (See "Vehicle Identification Number" in the Index.) Following is fuelinformation for the 4.3L (Code W) engine. Use regular unleaded gasoline rated at 87 octane or higher. Usepremium unleaded gasoline rated at 91 octane or higher for high power performance, when towing a trailer or with a high payload requirement. But when operating with a light load as a normal condition, you may usemiddle grade or regular unleaded.gasolines. The gasoline you use should meet specifications ASTM D48 14 in the United States and CGSB 3.5-92 in Canada. These fuels should have the proper additives, so you should not have to add anything to the fuel. 6-2