That is a US built GMC with a V6, Canadian Built GMC trucks were just chevy clones and have vin numbers much like chevy trucks.
10 = Model 1000 {1/2 ton}
01 = wheelbase 115"
C = Built in Oakland California
N = Series, 1960-61
5823 = serial number
A= DOT GVW rating, 6000 lbs of less.
Check this page of my old site for more info:
GMC 1000-3000 Year & Model Identification.