gibbons Posted September 22, 2008 Report Share Posted September 22, 2008 I have a 2007 classic reg cab short bed with a 4.3. I wana switch it out with a 5.3 or 6.0. But i dont no wat all will have to be changed. I keep getting different answers about everything. Can someone please help out. Also what would be better. I just want a straight forward no bull answer. Im from Phx AZ but currently in Colorado springs Fort Carson. INFANTRY HOOAH Quote Link to comment Share on other sites More sharing options...
EKperformance Posted October 27, 2008 Report Share Posted October 27, 2008 as far as i know you will need a stronger fuel pump, the wiring harness, a computer and motor mounts, there will probably be some small stuff as well like a radiator and ect... i did a swap on my truck its a 4.3 silverado but i put another 4.3 in it so its plug and play, if your truck is automatic u can use the stock trans, but you may want to get it beefed up a little. if u have a manual like me, i dont recomend using it as the nv 3500 is a piece of shit lol i went through 2 and mine is goin out again( my 4.3 isnt stock) double check i could be wrong, im sure someone smarter than me will have more info but i am a master ase gm tech, just not the best Quote Link to comment Share on other sites More sharing options...
SuperSportSilverado Posted October 27, 2008 Report Share Posted October 27, 2008 Not saying that no one on this site is capable of giving you the answers to what you ask but check out ls1truck.com, Alot of people there have done swaps like that. I think they can give you a better perspective of what you are trying to do and all the things you are going to have to do to get a 5.3l or 6.0l in your truck. Quote Link to comment Share on other sites More sharing options...
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