Can someone clarify vehicle_names.lua hash question for me?

That tutorial is wrong, according to the elements, this is the intended use:

So for hashes, use it like this:

Citizen.CreateThread(function()
	-- Nissan GTR
	AddTextEntryByHash(0xFA395577, 'gtr17')
end)

The code above will show “gtr17” in the bottom right when you enter the car.
If you want it to show “Nissan GTR” then use this:

Citizen.CreateThread(function()
	-- Nissan GTR
	AddTextEntryByHash(0xFA395577, 'Nissan GTR')
end)

The hash of course being the model name joaat hash. This hash you provided (0x9F05F101) is not the correct hash.
for gtr17 this would be 0xFA395577