97 GMC Sierra 5.0l soon to get a full 5.3l swap..

[pacobeagle]

Well, I hope to be picking up a replacement engine next week. This one, WITH warranty!

[pacobeagle]

I have one question, if given the option, would you go with a 5.3l or 4.8l? Additionally, will my ECU that was running my 4.8l run the 5.3l?

[ccreddell]

I'd go 5.3. Same engine as the 4.8 except for the stroke. (And before you all chime in with the different parts between motors, yes I know that 4.8s have a longer rod and flat top pistons). Any time you can up the stroke, its going to help torque-all things being equal. ECU will need reprogramming anyway, so it should work.

[exboatracer]

Between the two my choice would be the 5.3 also.

[pacobeagle]

Looks like I'll be picking up engine tomorrow. It's been raining down here all week. Tomorrow it should clear up. Due to budget, I think the 4.8l is the one I'll go with. Unless, once I get there, they have some crazy amount of 5.3l they want to get rid of.

[Mickeymotormount]

Hope all comes out OK. Definitely good advice to at least pull the valve cover or pan or something to make sure you don't get what you already have. Good Luck and we're looking forward to some pics.

[pacobeagle]

Me too! I need the truck running before April rolls around as I'm headed to San Antonio for some training. I'd like to take the truck in order to bring my bike.