1997 Chevrolet Tahoe Owner's Manual - Page 294
1997 Chevrolet Tahoe Manual
Page 294 highlights
When to Add Oil If the oil is at or below the ADD mark, then you'll need to add at least one quart of oil. But you must use the right kind. This part explains what kind of oil to use.For crankcase capacity, see "Capacities and Specifications" in the Index. What Kind of Oil to Use Oils recommended for your vehicle can beidentified by looking forthe "Starburst" symbol. This symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry this Starburst symbol. If you change your own oil, be sure you use oil that has the Starburst symbolon the front of the oil container. NOTICE: Don't add too much If your engine hasso oil. much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged. The engine oil fill cap on the "VORTEC" 5700 is located on the driver's side engine valve cover. The engine oil fill cap on the "VORTEC" 7400 is located on the front of the engine, near the radiator. Be sure to fill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you're through. If you have your oilchanged for you, be sure the oil put into your engine isAmerican Petroleum Institute certified for gasolineengines. You should also usethe proper viscosity oil for your vehicle, as shown in the following chart: 6-15