dogger

I am about ready to change out the coolant in my '03 HO Quad Cab. I plan on using Zerex G-05 antifreeze as this is HOAT formula which is DC approved. I will cut 50/50 with distilled water. Do I need to add a bottle or two of the Fleetguard DCA60L to the new coolant? Is it necessary to remove both drain plugs, 5 mm hex socket plug, one on each side of the block or is removing one sufficient to drain the whole block. The one on the driver's side is a wooly booger bear to access. Any recommendations would be greatly appreciated.

L8r,.....dogger

FMB

At 100k, I changed mine. I didn't pull either block plug. I drained the radiator, refilled, flushed (hot), drained, refilled, flushed (hot), drained and repeated till clean water came out. Drained and filled with proper amount of coolant. That was 33k ago.

rjm022

i drained and refilled at 70,000 miles. it took two gallons of zerex go-5 and two gallons of distilled water.