1999 Chevrolet Tahoe Owner's Manual - Page 293
1999 Chevrolet Tahoe Manual
Page 293 highlights
yellowblue Checking Engine Oil Pull out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level. When to Add Engine 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. NOTICE: Don't add too much oil. If your engine has so 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 V8 engine is located on the driver's side engine valve cover. The engine oil fill cap on the "VORTEC" 7400 V8 engine 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. 6-13