1997 GMC Suburban Owner's Manual - Page 296

Engine Oil (Gasoline Engine) If 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 get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground. 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. The engine oil dipstick has a yellow ring handle and is 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 show the actual level. 6-14