I know this subject is worn out buy now, but I have some questions and need answers quick. I have a 02 sierra 4.3l with a 5 speed and I have a 5.3 out of a 2011 silverado. What all do I need to do...I know that I have to change motor mounts and the 5.3 came with everything that was on it from the factory. But some of my main concerns are: will it bolt up to my 5 speed trans, what will I need to do to make the throttle body work (I know that they were electric after 03+) just basically I need to know some of the electrical things that I'll have to do or that I'll have to have someone else do like having the computer programmed...Any help will be greatly appreciated.