As of now i have not problems with my engine that alot of people seem to be fearing a using as a reason to bash the new I5 engine. I am personally geting a little tired of many peoples bias against the engine (not so much from this forum but from other sites and personal converstion w/ people) because of a just a few occurances. I understand that when you buy a new car you expect it to be perfect but not everything is perfect. Personally about 10 years ago in '93 my parents bought a brand new cavalier z24 with the 3.1 liter v6 which at the time was used in many of gm's cars and was proven to be reliable, after just 500 miles it developed an overheating problem and we eventually found that the block was cracked from a bad casting and that it was the cause of the problem. Every make and model of cars have a fair share of vehicles that end up with a bad engine or tranny its just the way things happen with something as complex as motor where just one-ten-thousandth of a inch can make the difference between a perfect engine and one that will go bad after very little use. Sure it is a new engine in a completely new truck and the I5 is a very uncommon set up but i am sure that gm would not dump millions into developing a truck that they were not completly confident in.