1995 GMC Yukon Owner's Manual - Page 284

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. I Maintenance Schedule Section 7 of this manual, "Scheduled Maintenance Services", explainsthe maintenance your new vehicle needs, and when it should be done. It also has a form that you can use to record the maintenance work done on your vehicle. Be sure to read this information. Fuel (Gasoline Engine) If your vehicle has a diesel engine, see "Diesel Fuel Requirements and Fuel System" in this Section. For vehicles with gasoline engines, please read this. Use regular unleaded gasoline rated at 87 octane or higher. It 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. In the United States and Canada, it's easy to be sure you get the right kind of gasoline (unleaded).You'll see UNLEADED right on the pump. And only unleaded nozzles will fit into your vehicle's filler neck. 6-2