i have a 2000 silverado with the 5.3l and i want to put in the 6.0l lq4. are there any problems bolting it in to the trans or frame? tuning?

 

What year LQ4? Get the 01 or newer and you won't have any trouble. There is a spacer on the center of the 6.0's flywheel. Sometimes it sticks to the crank. Remove the 6.0 flywheel, pop the spacer off, and bolt up your old flywheel. Bolt everything up like the 5.3 was. Plug it all in. You might have to switch out a sensor or two, depending on what year LQ4 you buy. Very easy. Get it tuned whenever you can, but it will run on the 5.3 tune.