[Sleepy Cheyenne]

This is my theory. I think anything between a 4.8 and 5.7 ls or original 5.7 can handle the job. But it would be maxing out the power and a real loss of mpg of 4.8 or 5.7. I think a 6.0 lq4 or like someone else said a 454 Vortec would do the job great and probably not suffer power or as much mpg wise. The one thing I do a Duramax would do the job in its sleep. Now that all being said the main purpose behind this truck would also be my driver during snow, rain, and like I said traveling with a trailer. My question is this which one gas engine or diesel would be easier or better to sit for weeks or months at a time.