General Motors offers two sizes of Duramax engine on their most recent truck models -- a 6.6L beast and a smaller 3.0L. What are the differences between them?
GMC Expands Capability of 2024 Sierra 1500 AT4X With 3.0L Duramax Engine autosphere.ca - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from autosphere.ca Daily Mail and Mail on Sunday newspapers.