1996 Chevrolet Suburban Owner's Manual - Page 292

Turn off the engine and give the oil a few minutes to drain back into the oil pan. If you don't, the oil dipstick might not show the actual level. To Check 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. When to Add Oil If the oil is at or below the ADD mark, then you'll need to add some 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 hasso much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged. 6-15