GTA Online weekly update – this week’s offerings include the Kart Krash: Full Auto racing mode and a new car, the Pfister Growler.This weekly update arrived earlier today and comes on the back of the recent GTA Online Tuners update, adding even more zany racing fun.A full breakdown of today’s update will come from Rockstar Games later today, but in the meantime, Twitter user Tez2 has a glimpse of some of the update’s biggest new additions:Growler is available ($1,627,000 – $1,220,250)Kart Krash: