How much oil does a c5 transmission hold?

10 quarts of Type H Transmission Fluid. This is a total fill up after the torque converter was drained. Do not overfill the transmission or you will have foaming or you could blow the transmission seals. If you did not fully drain it, check it at the transmission dip stick after everytime you put a quart in thru the dip stick tube. Did you change the filter? You might check therangerstation.com for other information.