Automotive GMC Creates the World’s Biggest Tweet to Promote Its 2021 GMC Yukon 270 football fields could fit inside the design The only way to capture it was via helicopter at just above 12,000 feetGMC/Twitter By David CohenOctober 27, 2020 GMC didn’t just go big to promote its next-generation 2021 GMC Yukon: It went world’s biggest. WORK SMARTER - LEARN, GROW AND BE INSPIRED. Subscribe today! To Read the Full Story Become an Adweek+ Subscriber View Subscription Options Already a member? Sign in