The 6.0-liter engine, known as the Vortec 6000 or LQ4, found in many GM vehicles from the early 2000s is known for being powerful, durable, and great for a heavy duty vehicle. While there is nothing inherently wrong with the 6.0-liter engine found in the 2001 to 2006 Chevy Silverado 2500 HD, it does have its common issues owners have experienced. Learn the top 3 Chevy 6.0 engine problems owners have run into and their fixes and symptoms.