4. L92 6.2L Vortec. With 402hp and 417 ft-lb. of torque, this variable valve timed V-8 debuted in the ’07 Cadillac Escalade.
Similar to the Corvette’s LS3, the all-aluminum engine makes even a heavy truck a blast to drive. The only thing wrong with it is that you can’t get it in a regular cab, short bed Sierra/Silverado, or for even more fun, a Colorado/Canyon.
The rest of the Gen III/IV family of engines has a huge aftermarket thanks to the LS1’s release in the Corvette for the ’97 model year, and the Camaro/Firebird in the following year. What do you want to do to add power: heads, cam, headers? Take your pick. Would you like forced induction with that? Do you prefer centrifugal supercharger, roots-style, or perhaps a turbo? It’s all available.