2012 Mack GU713, Truck Delivery, Coolant Reservoir, Fits to: Mack GU713, (USED) 2012 Mack GU713-COOLANT RESERVOIR. PLASTIC. To find out more about this part give us a call. We ship worldwide! Complete Recycling Group (CRG) 929 W Pulaski Hwy Elkton, MD 21921, Truck Year 2012, VIN 1M2AX04C1CM011778, Part Make Other 1M2AX04C1CM011778