User blog comment:Sammyrock0087/Heist Update is GLITCHED TO SHIT./@comment-25261281-20150311214819/@comment-4143911-20150311215954

The message would never appear for vehicles that are already in the game. Why would they add existing vehicles to your hangar when you can just buy them off the websites? The ONLY time that notification appears is if the added Vehicles are new DLC additions to the game.

And Monkeypolice, there have been Updates in the past that have said 'GTA Online', yet the vehicles have still been added to singleplayer.