If it has a stock, Original Equipment Manufacture, (OEM) oil pan then the pan capacity is 4 quarts. This engine requires 5 quarts with an oil and filter change, with a stock pan and stock filter. I stress, OEM! If it is not an OEM pan, then it may hold more. Be sure and not to overfill, as this will cause engine damage through cavitation.
While owning a vehicle is important to know the engine oil capacity. In a 1991 Chevrolet Silverado truck the oil capacity is five quarts of oil with the filter change.
5 quarts.
5.75 quarts with a new oil filter
Engine oil with filter change 6.0qts
The oil capacity of it if you're just draining the oil and changing the filter is 5.75 quarts.
Its 6.4L if you change filter also.
5 quarts
5 quarts
7qts
6 quarts
You would need to drop the oil pan and remove the oil pump to gain access to the intermediate shaft.
4 quarts with oil filter