I have a '99 silverado 2500 with a 6.0 liter engine, I want to replace it with a 5.3 liter from a 2000 silverado, will it fit? what kind of modifications do i need to make if any?

 

Why in the hell would you want to go down in size, esp in a 2500 truck?? That is like wiping your *** before you ****, it makes no sense

 

well i got a 5.3 ill trade ya straight up for the 6.0 as long as its running

 

 

https://www.performancetrucks.net/fo...d.php?t=472142
read the bottom of the page.
i guess he didnt think i was being nice so he made a thread so he can get laughed at.

 

There's nothing wrong with his question and if you can't answer it I suggest you post elsewhere.

Maybe his 6L is and he has a free 5.3 to work with?

Yes, it can be done but like previously mentioned it would be a bit downgrade for your truck. Plenty of good used 6L shortblocks around. I believe you will need the PCM from that 5.3 or one tuned for a 5.3 as well.

 

yeah, what he ^ said. but what's wrong with the 6.0 and what's yourr plans for it. i might need a 6.0!!!!

 

Yeah maybe not. But there's something wrong with his thinking.

The 4l80e wont work w/o a crank spacer. I'm not sure about the computer, but I don't see why it wouldn't work. For the few $100s he's saving in engine costs, he is building a slug that will overtake those savings on the engine with fuel costs.

Come man, really? Helping this guy run a 5.3 in a 2500 is actually hurting him. An iron head 6.0 will fit right up, and they prob cost as much as a 5.3.

 

im guessing he has a 5.3 on hand and it was free.

 

eh. that's like me taking a 3500 CCLB 4wd on 24" wheels and putting a 4.3 in it bc its free. its stupid, but whatever he wants to do. it's a simple swap. all he has to do is have the ecm tuned with a 5.3 and leave the 80e segments in the ecm.