2000 GMC Envoy Owner's Manual - Page 263

NOTICE: Don't add too much oil. If your engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged. 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. When to Add Engine Oil If the oil is at or below the ADD line, 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. 6-11