[53burb]

I originlly flushed it this way: Pulled off heater hose closest to passenger fender, ran engine, had water hose on & filling reservoir, did this for about 10 minutes., closed everything up, drove truck for 4 miles to make sure thermostat opened, redid same procedure except pulled both heater hoses off, continued flushing, & did heater core independant of engine, pulled lower radiator hose off & water pump & drained all water, then refilled with Prestone & water....