HOW TO DO A COMPLETE NBS 1999-2007 SILVERADO/SIERRA V6 TO V8 LS 4.8 5.3 6.0 SWAP! 

Thank you and appreciate it!

@@proyectosloscarnales4512 How do you run your fuel lines to the engine mine had the screw lines from the 4.3 an fuel rail quick disconnect on the 5.3????

Que tal bro quieto hacer lo mismo de donde eres

u need a setup from any 5.3 or 4.6 chevy thats 99 02 nothing newer or its not a direct swap and make sure u get a non flex fuel setup to so u dont have to have it tuned

Hey, appreciate it and thanks! I’m not sure if I mentioned it on the video but we were changing some other items aside from the swap so it just seemed easier to remove it all, that way it also helped record better angles for the video.

Same problem I ran into…

You can shoot me a message on IG @ JulioPLC1 and it would take a little more time but you can go to BP automotive and in their website they have a swap harness and different kits that would include an ecm so you can swap it into anything. With that you would just have to wire in the gauges yourself and the transmission for the neutral safety switch and the reverse lights. You get a pedal and ecu with a baseline tune to start up and take it to dyno tune yourself later! Shoot me a message i would love to see the progress on this!

I also repinned it too

Depending what harness if it’s oem make sure the relays are good and the power and ground are hooked up too not just the green and blue wires if it’s aftermarket trace the wires make sure u got a good power source and ground on both ends

Thanks, I solved

You can do that and get the 05-06 intake. You can also get a bit better power with a nnbs intake with adapter for the throttle body. As well you can buy a plug for the return line it runs about 25-30 bucks and problem solved without buying any more fuel rails or intakes.

You just need a return less fuel rail 05+

Compare the bottom of the connectors that plug in to the fuse box in general most colors should be the same. Aside from reworking the wires yourself or taking it to a electrician shop you can switch the whole wiring harness and computer to the correct set-up. Sounds like you have a drive by wire set-up on a drive by cable vehicle.

. thank you very much. I will have to get a hold of a new fuse box then .

I have not used that spacer and this truck in specific ran a good year before the 4l60 gave out for too much fun. I was told different valve bodies and torque converters is the difference at the transmission shop.

@austin Winchester I heard about needing the spacer as well in order for the flywheel to fit correctly. Have you gotten any new Information? I’m doing the same swap right now and I have my engine out just trying to find more information on the spacer so I don’t have to separate engine and trans again. Also did you use the v6 torque converter or did you upgrade to a v8? Thanks again

@austin Winchester I heard about needing the spacer as well in order for the flywheel to fit correctly. Have you gotten any new Information? I’m doing the same swap right now and I have my engine out just trying to find more information on the spacer so I don’t have to separate engine and trans again. Also did you use the v6 torque converter or did you upgrade to a v8? Thanks again

If u get a donor engine from 03-06 (drive by wire) the computer and wiring that come with it should be a direct fit to your current fuse box and you would just need a tune to be out and driving. The older engines 99-02 (drive by cable) have a different setup and you would need to move some wires around to get it to fit on your current fuse box.

@@proyectosloscarnales4512 O got it. Thanks for the info I'll probably go with the 03-06 setup then still deciding what V8 i want, My buddy is a 6.0 guy in the square bodys, he gets those engines frequently some how

A 6.0 is a really good way to go and you can usually find it in a old work truck or van at a wrecking yard

@@proyectosloscarnales4512 for sure. We might have another one coming here soon high miles but runs great the truck is rusted beyond repair

@@proyectosloscarnales4512 como puedo llevarles mi chevy silverado 2008 necesito un cambio de motor

what are your issues

On the 03 if it has a single fuel feed and the intake does too it just plugs in you will just need the fuel line removal tool to pull the fittings apart and clip into the new ones

@@proyectosloscarnales4512 thanks what fittings do you recommend?

These are the fittings I ran the 5/16 is for return line the 3/8 is for the pressure side 165056ERL 5/16 to -6 AN adapter 165006ERL 3/8 to -6 AN adapter 658490 Russell 1 ft -6 hose (2x) 644123 Russell 3/8 push lock 644113 Russell 5/16 push lock

De nada 👍🏽

Same transmission casing so bolts up

@@proyectosloscarnales4512 nice I keep hearing I need a spacer on the flex plate because the v6 4l60e sit forward or back

Yea with this truck in specific we did the same thing you are saying. We just swapped the v6 to the 5.3 and left the same transmission which lasted about a year before it gave out.

@@proyectosloscarnales4512 thank you bro I really appreciate that ❗️❗️I’ll keep you updated if anything 🗣

Hey bro I have a question, do I need to change the radiator if I’m doing the 4.3 to 5.3 swap on my 01 Chevy

No I just change it to do e-fans of the truck doesn’t always have them but if you don’t want to change it you shouldn’t

I’m not too sure I imagine it’s switching over all the suspension like control arms and front differential mount and such but Ive never done it. What I do know is the transmission can just get switched over from 4x4 to 2wd just switching the tail housings and getting rid of the transfer case.

I did have the ecu from a 5.3 vehicle and used it to get flashed and use on this vehicle. You can use certain ecu’s from a v6 and just flash them and set the tune for v8 settings but we didn’t have to do that.

@@proyectosloscarnales4512 Thank you for the quick response. I just bought a 02 silverado SWB with a 4.3 and I am going to do a 5.3 swap. I am good on the mechanical stuff , just not so much on the electrical. But willing to take the time to learn, I plan on making my own stand alone harness to save some money as I am not wanting to just throw money out the window when a little research and hard work could save me hundreds. What method of tuning do you think I should use given that I am just building the one truck. should I buy an HP tuner or is there a cheaper way to tune the ECU? Again thank you for your help!!!

If it’s an 02 u can use the harness and ecu from the engine u get and just pay around 100 bucks to get it flashed to work for you. In the process you can shoot me messages on my IG @JULIOPLC1 to see your progress bro! 👍🏽

We did use the flex plate from the 5.3 the torque converter and trans was the one from the v6. The transmission lasted a while but was upgraded after it gave out.

I haven’t messed with the cruise control on the swaps I’m not sure what to tell u on that bro

As long as u got a tac module that goes from the main harness then down to the pedal it should work if not you need it. Only if the throttle body is electronic. Also the gas pedal does not go connected straight to the throttle body it needs the tac module to function properly.

@@proyectosloscarnales4512 lo tengo todo carnal esta conectado y todo lo mismo como el swap que hiciste, pero al momento de pisar el pedal no manda señal al throttle quiero saber si es por q le falta el tune

No bro I haven’t ran into that in any of the swaps my only suggestion is check the grounding wires for the battery light. The fuel might have the signal wires backwards you might get away by switching them around. And check that sensor they take in the booster that actually broke on mine and I just ended up replacing the booster.

@@proyectosloscarnales4512 is there a specific ground wire for the battery i should look for? On the signal wire for the fuel do you mean by the fuel pump?

@@JoseRamirez-sw3et did you end up finding the problem bro ?

Not really aside from the obvious like harness and fuel if you plan on keeping it manual you might have to look into a flywheel and clutch to work out

Yea bro just like the video u pull out the cable and pedal itself and install the new pedal with the tac module and with the flashed ecu u will be ready to go

Proyectos Los Carnales thanks man

@@proyectosloscarnales4512 hey bro and with the tac module is it just plug and play? Then just get a tune?

Yea if it’s a 03-07 engine you just run the new harness and pedal with the tax module and get the ecu tuned/flashed

@@proyectosloscarnales4512thanks bro n just the harnes that conects to the pedal right?

If you want to keep it a daily driver it might be good to go with either a stage 1 or 2 cam kit (cam springs and seals) from BTR or Texas speed. Those cams don’t require a stall converter and are mild enough to where you don’t need to swap lifters pushrods and such.

@@proyectosloscarnales4512 doing that will the stage 2 give the 4.8 a little more horsepower.....then what type headers wil be good after I pick a cam.? I was really wanting to go with stage two...what's the difference between the 2

If doing oem harness you need the drive by cable harness not the drive by wire with electric pedal. Unless your doing a complete swap harness you may have the wrong one now. And the computer needs to be tuned to turn on and stay on otherwise it will just crank and maybe come on for a second then shut off alone

You need the new harness and ecu look at the small black connector you pull from the bottom of the fuse box the red/blue harness will not match up the wire sequence and the red/green will

There is a TAC Module that plugs into the engine harness and goes bolted to the firewall by the booster, and then it has a small harness that goes from the module to the gas pedal. You can briefly see it at 16:53 before we actually bolted it to the firewall and installing the pedal.

have a tuner check out your ecu aside from making sure it has disabled the anti-theft make sure the computer is good and not locked

Yes you’re going to need different items like the harness and throttle body electric pedal and the module for it. Amongst other sensors and the pin in the bottom of the fuse box should line up the same.

@@proyectosloscarnales4512 i heard the o2 sensor plugs will be different but everything else should work? thank you for the response this has been driving me insane for the past couple months!

@@proyectosloscarnales4512 been trying to get it to work with drive by cable, but it was not working out, couldn't find a 03+ v8 with drive by cable. was scratching my head.

@@proyectosloscarnales4512 does it matter 5.3 or 6.0? easier to find a 5.3 4l60e then a 6.0 4l60e?

Have you got the swap done?

What year is it?

Instagram @plcbuilds

@@proyectosloscarnales4512 I messaged you bro

Yea the engine brackets accommodate for the engine moving keeping the transmission in the same location

To the bottom of the fuse box when you take off the cover for the fuses and pull up the box you can see a black square connector with a 8mm holding it down just that and the other ends it leads to with clip connectors

Appreciate it 👍🏽

@@proyectosloscarnales4512 bad ass videos bro been watching all day 🔥😎

Honestly just make sure you get the computer tuned or programmed (VATs delete) properly it’s what it sounds like

@@proyectosloscarnales4512 yeah because the ani theft system is not even on anymore and it cuts off right away

Fuel lines are easy bro. What do you need to know or see?

@@ls4.8frank of how to do them bro and what parts do you need and where to get them at bro

Like ls4.8 frank said it’s fairly easy as far as a quick clip to see it done I’ll post a quick video on my IG@ JulioPLC1 so you can see how to and the parts you can order on summit Jegs or Amazon. Personally I got mine at a hydraulic hose store near me

@@proyectosloscarnales4512 thanks bro

@@andhonialvarez2999 I'll also be taking the heads off of our 1999 Silverado with a 2005 5.3L swap. I have to put the ported 243 heads on and set aside the 862's. But when the heads are off I have to go in and fix the fuel line connections on the hose sections that they added because they didn't tighten them down i guess. I already had to replace one of the upper/intake side fittings because they had the metal fuel line bent a little causing it to leak and they chewed up the threads on the AN fitting somehow. It really is easy though bro. I could order lines for days and fittings and do these swaps all day long. I can even do the 4L60E to 4L80E swap in these trucks really easy with the exception of needing a new driveshaft made and a custom tune.

Yea bro the motor mounts are the same but just be aware that the brackets that actually go on the frame to hold the motor mount won’t work from a Yukon you need Silverado v8 ones for the swap

Just a base tune to let it turn on after the swap and erase emissions codes

No. The v6 is a drive by cable but u have to change the harness to a blue/green and add the electric pedal and tac module for that year

@@proyectosloscarnales4512 even if i have the ecu and complete harness to go with the 4.8?

The difference is where it plugs into the fuse box. U can see a black square-ish connector and compare the wires (colors) they won’t line up and then you’ll need a electrician it’s a way bigger hassle than just getting the correct one you need from the beginning.

@@proyectosloscarnales4512 ok because i also have a blue/green harness but alot of the sensor plugs are different on the motor and some arent even there

If u plan on using that engine u will have to change those sensors off the back I know the oil pressure the a/c and oxygen sensors are different also your throttle body bro. That’s y I say get the engine swap for the correct year to make it all easier down the line.

No we ran it straight off from v6 to v8 and the tranny ran fine for about a year under decent pressure

Pacesetter headers

Yea it ran for a good year on the stock v6 transmission after we installed a 4l65 we had ready for it

I don’t have a shop I just do this as a hobby in my back yard.

You can get the parts at a local hydraulic hose shop near you or online like at eBay or summit racing.com it’s 3/8 for fuel line 5/16 for return line for the fittings you will need

Can you send me a link in eBay to get the right one if is possible tnks?

165056ERL 5/6 to -6 AN adapter 165006ERL 3/8 to -6 AN adapter 658490 Russell 1ft -6 hose (2x) 644123 Russell 3/8 fuel rail adapter 644113 Russell 5/16 fuel rail adapter

@@proyectosloscarnales4512 I did the swap just need to double check my connection I send you pictures tomorrow I just have one question about one connection tnks

@@proyectosloscarnales4512 where can I send you pictures ?

That’s what I did to mine but with a 5.3. Aside from the actual harness you need to get for a 99-02 you will need the throttle body, fuel injectors(maybe the fuel rail or even a whole intake from a 99-02 to make it easier), oil pressure sensor, and the a/c system for your year.

@@proyectosloscarnales4512 thanks for the info

It sounds dope I havent looked much into them since that’s around the lt engines now and it’s a different setup but good luck on the project enjoy it and take lots of pics to go in the memory bin!

I’ve done the v6 to v8 on my 2015 Silverado

@@steezytrill8484did you use the v6 transmission and did you replaced all the wiring or how did you get it work man?

@@TheTegra95 you can use same transmission

I don’t have a shop bro I do this as a hobby with family and friends and make these videos to help people with the process. Any questions I got u 👍🏽

It’s a store called Parker Hose where I’m at but you can look up adapters fittings and hoses online like eBay or summitracing.com

Everyone has a different price I made this for anyone to be able to do it themselves. I’ve seen swaps go from 2k-4k it all depends

No just the engine/trans harness that plugs into the fuse box in the engine bay.

@@proyectosloscarnales4512 do you need the tac moduel to get it running?

If your doing a 03-05 drive by wire (electric gas pedal) you do

@@proyectosloscarnales4512 oh okay thanks

Junk yard make sure it’s a Silverado/Sierra and it’s 2wd if yours is 2wd and not 4x4

@@proyectosloscarnales4512 thanks I’ve been doing mine but it just doesn’t sit right but I was using the original ones

That’s your issue then. Get the new plates and you’ll be good.

@@proyectosloscarnales4512 thank u 🙏

That tac module where did u connect it or did you swap it with the other v8ones

I do not have a shop we just do this as a hobby in my backyard

What all exactly do I need to buy to do the swap

Yes been running the same transmission and converter since the swap and it runs fine. Will get built trans and bigger converter once it gets aftermarket cam installed.

AZ bro

Yes it was later replaced with a built unit but overall it’s still a 4l60 with the same bolt patterns

@@proyectosloscarnales4512 alright thx bro

@@proyectosloscarnales4512 ay I got a 2001 Sierra I’m doing a 5.3 swap but I got a motor from a 2005 model will it work or is their gonna be a lot of problems

Look for the harness for a 00-02 that way u plug and play u will have to change some sensors like the oil pressure and the ac lines but it will be easier than breaking down the fuse box

@@proyectosloscarnales4512 hey bro can you make a quick video where the ground cables hook up… took some off and forgot where they hook up to… or do you have a link to a video

Everything still works with the original dash harness. In the video you can see the v8 engine harness plugs into a TAC module and that has a small harness that goes through the firewall and plugs into the electric gas pedal