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I already answered that there is no need to do carbon cleaning through the fuel system as this engine is direct port injected. The fuel does not come into contact with the intake valves.
If the OP wishes to engage in fuel cleaning he can just buy PEA and DIY it. Whether he needs it or not cannot be determined by us over the interwebs.
Because the fuel does not come into contact with the valves is the reason direct-injection engines generally need carbon cleaning.
Oil vapors pulled in through the PCV do get on the back of the valves and as there is no fuel flow over them to clean it off, it gets baked on and needs to be removed.
Some engines (typically german turbos) are notorious for this. The LT1's are not, so carbon cleaning is rarely needed on our cars.
Because the fuel does not come into contact with the valves is the reason direct-injection engines generally need carbon cleaning.
Oil vapors pulled in through the PCV do get on the back of the valves and as there is no fuel flow over them to clean it off, it gets baked on and needs to be removed.
Some engines (typically german turbos) are notorious for this. The LT1's are not, so carbon cleaning is rarely needed on our cars.
You misunderstand the point. The dealer is offering a fuel based solution, that won't do anything to the valves.