1998 GMC Suburban Owner's Manual - Page 306

Engine Oil (Gasoline Engine) I f your vehicle has a diesel engine. see "Engine Oil (Diesel Engine)" in the Diesel Engine Supplement. It's a good idea to check your engine oil every time you e oet fuel. In order t o get an accurate reading, the o i l must be warm and the vehicle must be on level ground. Checking Engine Oil Pull out the dipstick and clean it wirn a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level. :,I* ;& ,..:.>$ . :8& 3 7 ..., ... .. . 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. The engine oil dipstick has a yellow ring l~andle is and located on the passenger's side of the engine. 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 slmw the actual level. 6-14