Looking at your owners manual, it calls for distilled water use. That being the case I would not use the Prestone Flushing T method.
If the radiator petcock is easily accessed, doing some d&fs with distilled water till basically clear is an option. Using lower radiator hose to drain (for d&fs) also an option. Then can use full strength G-05 to ~50% of system capacity then top with distilled.
Or, just wanting to do a single radiator d&f also an option( will leave some old AF in engine block). You could still use full strength G_05 mixed with half distilled in a jug, and pour in. Last could use G-05 premix 50/50 for single d&f, but that is the most expensive way to go.