In practice, however, it might be slightly difficult to find a local dealer with the LT4 in stock. Some retailers list versions of the LT4 for around $18,000 but say it's on back-order.

Read more: The 15 Most Reliable SUVs Of All Time, Ranked General Motors introduced the dual overhead cam (DOHC) 4.2-liter inline-six-cylinder Vortec in 2002. The first production versions of the ...