SDPC Tech Tips: Gen 3 and Gen 4 LS Engine

In this segment, we go over the differences between the Gen 3 and Gen 4 LS platform, and what you need to do to run a Gen 4 LS in a car that originally ran a Gen 3.
Parts featured in this segment:
Gen3 to Gen4 conversion kit:
sdparts.com/i-24134695
Knock/Cam Harness:
sdparts.com/i-24110029
Lingenfelter 58x to 24x converter:
sdparts.com/i-24504736
#SDPC #SDPCRaceshop #Techsualhealing #TechTips

[@mattmcbride1283]

Impressively pertinent video. Covers exactly the topics needed to help someone move from a Gen III platform to a Gen IV. Also, there aren't a lot of people that can speak that intelligently, yet understandably, about topics of this nature. Someone give that man a raise!

[@aaronzavala4336]

I had a question right now I got a junkyard find it’s. 5.3 iron block from a 2002 suburban and I have a 08 gmc Sierra I want to put it in I was wondering if it’ll bolt right in. Right now the 02 5.3 has the electronic throttle body a cable that connects to the oil pan and the knock sensors maybe I can by pass the oil pan with the old one as well as the intake connecting the throttle body but now what about the knock sensors ?

[@RichardPugh-rz7qq]

You answered my knock sensor question for my gen 3 5.3 Always enjoy your videos.

[@ryurc3033]

Thank you for the information sir. I hope this gets shared 10000 more times. Solid ideas for a 5.3 in my 76 Chevy. I have everything for the swap exept the computer. I was going to do a stand alone tci box on a 4l60, (wrong bellhousing) or manual trans/carburetor for simplicity.....the great debate is on.....

[@colbytaylor452]

Extremely helpful information 👌

[@ricardososa1761]

Thanks for the info I’m swapping a ls2 in my 67 chevelle

[@skylinefever]

I love seeing these various sensor converters that make these stock computers work. I learned about it for the first time back in 1998. When getting more than 400 horsepower out of a Nissan 300ZXTT, the stock MAF becomes a choke point. Various sensor formula converters would make it possible to fit an oversize MAF and still get proper drivability. I'm kind of surprised that the 24 tooth computer couldn't be reflashed to understand the 58 tooth wheel. Oh well, as long as there is a quick solution, I'm happy.

[@pasto2frio386]

Extremely informative 🙏

[@Louie88]

I swapped an lq9 iron block with forged internals but with a 58x reluctor into a 5th gen Camaro. I love how versatile these engines are.

[@aaronzavala4336]

Yoo can u help me out

[@Inviting1word]

Thanks for the info, I dont mean to sound like a critic as you are very professional. When you're talking you kinda of talk your self out of air and gasping as points, that's all brother thanks again I'm new to the sawp stuff and i do appreciate it.

[@maxx236]

Solid information since I’m swapping an LS7 into an 01 C5 Z06. What cam sensor would need to be used at the front of the timing cover if swapping this particular LS7 to 24x reluctor and 1x cam gear? Planning to run the LS1 to LS7 cam adapter harness to the front of the timing cover.

[@7040slim]

I have a 2002 avalanche I change the knocks sensor Street times underneath the valley cover and they’re still bad I’m trying to relocate them on the side of the block there is holes that are already pre-drilled and pre-tapped I hope I have success this time around I have a new computer that has the newest I am best software up-to-date with the Chevy 5.3 L engine thank you for your time I hope to shop for everybody else if anybody knows anything about it can you give me a shout my name is Ed And thank you very much the gentleman was very very well spoken and he knows his stuff I just wish she was in the area where I live in Jersey again thank you for your time and patience God bless and stay safe

[@runnningonempty]

very good

[@thesetwohands6982]

thank you for your information I just subscribed because I am building a vehicle that never was meant for my parts. its a 78 j10 lq4 block 408 stroker. the crank I want is a 58 tooth do I just change out the reluctor wheel of my crank or can I configure it in my Holley dominator ecu that controls the engine and 4s80 transmission? not using the oem computer. thank you

[@jls032]

Do gen 3 timing chain sets fit in gen 4 blocks to make them the nessesary x

[@IsaacHolton]

So I have a 07 Escalade that previously had the 6.2 engine that had a 58x reluctor and I’m swapping to a 5.3 that is gen 3 which has 24x reluctor is there a way to make this setup work with original pcm and harness that came with the truck?

[@lifeishard1211]

if I pick up a gen 4 block and bore it with cylinder sleeves to a 427 and then put all my gen 3 parts on it, will the gen 3 sensors have enough range support that amount of airflow and what not? the gen 3 i'm running now is an LM7 in a 2002 Silverado.

[@aaronzavala4336]

Hey I had question I had a bad crank shaft on my 5.3 I was wondering if I can use a gen 3 5.3 crank shaft I have sitting around I just gotta take my reluctor wheel off my gen 4 and replace it on the gen 3 then bolt it back up

[@bigblockchevyguy1145]

Since the 5.3, 6.0 and 6.2L engines have the same stroke you could just swap crankshafts to a 24X gen 3 crank does that mean you would need to use a gen 3 crankshaft position sensor?

[@w41duvernay]

My biggest problem is I'm dealing with a ls4 engine going into a fiero. Edelbrock wants me to convert it back to a ls2 to use their Fuel Injection system.

[@rsquitieri4057]

Where did you put the oil pressure sensor on the LS3 block?

[@gio6191993]

Mine has the knock sensors on the side and cam sensor on the valley and afm which gen ls do I have

[@BuiltDifferent13]

364/450 my favorite LS

[@blacksheep-ch8ne]

Hi Nick! This is my first time ever messing with a LS.I have a question 01 Silverado 1500. I keep getting a misfire on cylinder 8 I'm wondering if I have stuck lifters I've changed out fuel injectors and knock sensors but the misfire comes and goes runs fine barely any hesitation or shakes your help would be appreciated thank you in advance

[@Lostsoul.668]

So I got a 2005 6.0 Escalade and I want to put a 6.2 in, will the 6.2l bolt up to my transmission and torque converter also will the exhaust fit like original.

[@andrer3854]

If I was building Lq4 gen 3 from the ground up to go into a hot rod. How would I convert gen 3 block to gen 4 like 24x to 58x.

[@gmtech9884]

what size tap ? for knock sensors

[@cruzfernandez4554]

Thank you so much for your information! I have a 2001 Chevy Suburban 2500, I bought a Gen4 LY6 to do the swap. Please advise.

[@bigshotpep7500]

did you do it. and did it work

[@michaelperdue5220]

I’m taking a gen 4 5.3 with electronic throttle body out of a 2005 Chevy Tahoe and putting it in my 2001 gmc Yukon xl . They both are 4x4 . The 2001 is a gen 3 5.3 .with cable throttle body . Can I put my cable throttle body and intake on the gen 4 and it work?

[@TheObsBuild]

Finna put a Gen 4 with a 4l80e transmission if anyone got tips on the wire harness part

[@23steph13]

Can I run a Ly6 with gen 4 harness and 58x crank, 4x cam, gen 3 intake/throttle body/heads, 6l80 Transmission?

[@wildwoodtop]

If the reluctor wheel has slipped why can't you tap it back in place and install a set screw or tack weld 🙂

[@puterg0d]

You completely ignored the '05 vette, 05-06 GTO, SSR, etc... i.e. those with an LS2 but 24x reluctor, and 1x cam gear in the front.

[@TexasNEV]

Does the Gen IV LS3 bolt right up to the Firebird/Camaro T-56 6 speed?

[@chandlerlofton6536]

I’m putting a gen 4 engine with a 24x crank in a gen 3 truck. Can I just use a gen 3 crank sensor in this gen 4 block?

[@MrGsune]

i can use any gen knock sensors with may 3er gen pcm... hptuner

[@BuiltDifferent13]

most underrated LS engine LY2/L20/LR4.... not to mention you could get the LY2 with a 4L70 in the work truck model

[@aaronzavala4336]

I had a question right now I got a junkyard find it’s. 5.3 iron block from a 2002 suburban and I have a 08 gmc Sierra I want to put it in I was wondering if it’ll bolt right in. Right now the 02 5.3 has the electronic throttle body a cable that connects to the oil pan and the knock sensors maybe I can by pass the oil pan with the old one as well as the intake connecting the throttle body but now what about the knock sensors ?

[@michaelbaskinmichael9862]

I’m adding 03-2015 ls 5.3 swap what will I need

[@lrm17romo93]

Iam trying to put a gen 4 in a 09 g8 gt is it posible ? Has anyone done it ? I know i have to change the the brakets and oil pan but will all the plugs fit in the sensors ?

[@SuperMultibobby]

do you have a video about the tapping section ?

[@Sdpartscenter]

Hi @Jérémi Mandeville , meant to reply to your comment before: kzbin.info/www/bejne/eXPZnniKr66gj5I

[@alfgotl]

what about VVT? It won't work mostlikely?

[@bradleymadosh3596]

My friend has a 07 Chevrolet silverado 1500 5.3 has the nock sensor's on side of engine. The motor he bought was not Aluminum like his engine it was CAST iron block. We didn't know they was different until we put motor in and started hooking things up. The cast iron block had knock sensor's on top of engine and cam sprocket was a 3 bolt with sensor on timing cover. We bought the sprocket that will adapter to that but the engine runs but no power. What do we need to fix this problem. Thanks for any advice on fixing it.

[@actionjksn]

I switched out a gen 4 engine to a gen 3 and had the newer reluctor wheel pressed on and changed the cam sensor out. My engine only ran on 4 cylinders. I had to take the computer out which takes less than five minutes. I took it to a tuner and told him what I had and what I switched to. He reprogrammed the computer and now it runs perfectly I hope that helps. It cost me about $200.

[@aubreyroche5080]

Is my Gen 3 6.0 Cam the same as the Gen 4 ?

[@BuiltDifferent13]

I would love a LS2/T56 swap for my 2016 Silverado... 2014 to 18 in Mexico. they had manual transmission so there is a clutch pedal assembly

[@Alex68dash]

So you're trying to put a gen 4 motor in a gen 5? From what I've heard anything that's gen 5 is not interchangeable with gen 3/4 motors

[@elr456]

Assuming you successfully connect all the sensors and unite the Gen 3 computer to the Gen 4 engine, what about the rest of the car’s electronics like the AC, key ignition, windows and stuff, is that all unaffected by the swap? It sounds way too easy

[@Sdpartscenter]

It does sound a bit too easy! If the Gen 3 computer is native to that car, it should work just fine.

[@dakotahfisher9535]

So since I’m building a Gen 4 from the ground up. (LS Swapping a 01 Mustang GT). Can I use a Gen 3 timing gear etc? Because I’m putting a 3 bolt 228 cam in it.

[@Sdpartscenter]

As long as you get the correct cam reluctor (either 1x or 4x)

[@orcadv]

Hi. I am confused, the Lingenfelter box has a cam sensor connection, so why would the casper knock sensor harness extension also need the cam sensor connection too?????

[@Sdpartscenter]

Because the knock sensor and cam sensor location moves, and the connector for the knock sensor is different. The casper harness solves these issues.

[@michaelgarnett1196]

What does LS stand for

[@ftw449]

So I have a Gen 4 LH6 that I am swapping into my 01 Corvette. I tore the Gen 4 engine down and swapped the reluctor wheel from the original 5.7 to the new Gen 4. So now that it has the 24x I would just re-use the crank sensor out of the 5.7? For the cam sensor I have a new 1x cam gear but would the new updated cam sensor from the gen 4 motor read the 1x gear? I have the extension harness for the cam sensor I just want to make sure the gen 4 sensor will read the new gear, or if I need to do some wiring.

[@Sdpartscenter]

That will work! Always match the crank sensor to the reluctor.

[@ftw449]

@@Sdpartscenter Awesome! Thanks for the quick reply! Your videos have helped me so much through this swap!

[@michaelashby868]

Although your video is 2 years old I have some questions. I have a 2011 silverado. Swapped to a LS2 non vvt non afm, 58 tooth reluctor e38 ecm stock. I had a shop perform a tune with HP tuner. Since I did an exhaust delete, ran a 160° Thermostat. The guys shop is closed. I wanted to make adjustments on my tune. Which tuner in your professional opinion would best fit my need?

[@lifeishard1211]

my recommendation is to buy your own HP Tuner and have someone remote tune your Silverado.

[@sebastiancarlos6344]

@michaelashby868 do you need the 58 reluctor?

[@samuelerasmus7415]

Hi . This not related to your video. Please forgive me. I would really appreciate your advice. I have a LS2 L98 motor bore to 4.030" Wisco K448X3 pistons. Make good power on wheels (389kw on wheels) but still smoking and use oil. Ring gup is perfect piston to sleeves glearence good. Dubbel check at different machine shops. What can be the cause?. I would really like, and appreciate if you can give me same guidence. Thanks

[@chrismiller7116]

Can you do a video where you convert a gen 3 to a gen 4? Thinking of tapping o e of the tabs on the block near oil pan for knock sensor

[@Sdpartscenter]

If you mean putting a Gen 4 block in a Gen 3 car and running it on the Gen 3 PCM: kzbin.info/www/bejne/eXPZnniKr66gj5I If you're trying to put a Gen 3 block in a Gen 4 car on a Gen 4 PCM, you have to change the reluctor wheel on the crank as well. Considering the price point on all that, it's usually easier and more effective to just start with a Gen 4 block.

[@chancerowland4646]

@@Sdpartscenter If this guy meant gen 3 into a gen 4, I am also interested in some info. Basically I have a 2002 5.3 lying around and have a 2009 LC9 with the dod/afm lifter issue. My thoughts were to put the 2002 LM7 in the 2009 truck. What are your thoughts about that???

[@rickyherrington5571]

I’m wanting to put a 06 5.3 in a 08 truck any tips on what has to be changed. I can possibly use my 08 cam and crank.

[@juanjaimez9837]

So are the knock sensors on opposite sides of the block?

[@Sdpartscenter]

Correct, left and right bank.

[@kennethalbert4653]

Does the Lingenfelter box work the other way as well ? Likely No, so is there a pre fabbed set up if someone was to go the other way, Gen3 engine in a Gen4 Tahoe ??

[@Sdpartscenter]

Sell the Gen3 and find a Gen4, or take the Gen3 apart and change the reluctor wheels.

[@kennethalbert4653]

@Sdpartscenter The Gen4 in my 07 Tahoe is bad (200k mi). I am looking for a replacement and hoping for a power upgrade to "justify" the effort. I saw the Summit 450hp 5.3 which is why I was asking. What would you guys suggest ??

[@marcocasillas5023]

What do I do with the VVT I left my disconnected does anybody have any idea 💡 gen 3 GMC truck with the Gen 4 swap I bought the 24 to 58 reflector adapter kit and x-link that LS 3 throttle body from you guys thanks

[@Sdpartscenter]

We recommend deleting the VVT. sdparts.com/i-24132282

[@transamracing12s]

How do you put a 1x cam signal on the front

[@Sdpartscenter]

By using the lingenfelter conversion box. It will not work if you put a 1x cam gear in the engine.

[@jessehaveman5795]

I'm looking to swap a GMC 2008 5.3L into a 2008 4.8L Silverado. Will I need anything other than a new computer to read the sensors on the 5.3L?

[@Sdpartscenter]

You should be able to just put the 5.3 in there and load an appropriate tune to the existing 4.8L computer since they are the same year.

[@tyronejones6086]

I have a 2010 suburban flex fuel Ltz it have a gen 4 engine in it but I want to put a Gen 3 in it how would I make it work with my computer system

[@Sdpartscenter]

You have to add a 58x reluctor to the crank, change to a 3x sprocket on the cam and a mix of other things. Honestly it's better to just do a Gen 4 engine, sell the gen 3 and never look back.

[@pitkool]

Is there ANY way to put a gen 3 into a gen 4 vehicle? I ask bcuz my bro-n-law built a 3rd gen 5.3 for himself but sold the car & would sale me the motor for what he has in it but my 2011 Yukon has a 4th gen in it. Is there ANY kind of fix for that?

[@Sdpartscenter]

The only way is to swap the reluctor ring and cam gear to the newer style.

[@chaningdodson4245]

Are gen 3 an 4 blocks exactly the same other then sensor locations?

[@ryanjacobson2637]

No

[@Luke_KJ]

No, different oiling ports in the block for afm engines

[@skylinefever]

The Gen 4 valve cover is different and uses a fixed orifice instead of a PCV. The oil baffling are also much different. You can fit a Gen 4 valve cover and reduce oil consumption.

[@dakotahfisher9535]

So as long as I use a 24x crank and a 1x cam sensor in my Gen 4. And obviously the extenders. I can use a Gen 3 harness on my Gen 4?

[@dakotahfisher9535]

And Gen 3 knock sensors

[@Sdpartscenter]

That's correct!

[@mikeeraya2120]

What do i need for a 5.3 gen iv to a 6.0 gen 3 swap can i use my gen iv ecu???

[@Sdpartscenter]

Sell the Gen 3 and get a gen 4 engine. You have to change reluctor wheel on crank, 3x sprocket on the cam and other sensor/harness relocation mods to make the Gen 3 engine work on a Gen 4 pcm.

[@breannamartinez7145]

If i was putting a ls1 in a 08 silverado would a holly system solve all these wiring differences?

[@Sdpartscenter]

It will run the engine, but you might have some wiring issues on the vehicle (body control) side you'll need to overcome.

[@actionjksn]

I need some professional advice please. So I have an 08 Silverado that came with a gen 4- 5.3 liter engine. I bought a gen 3 LS in a 6 liter. I had a piece pressed into the crankshaft, I think it was the reluctor wheel? And he switched out the cam thing on the front. Then my engine ran on four cylinders until I took the computer to some guy who reprogrammed it so now it runs great. Here's my problem. The guy who did it decided not to install the knock sensor at all. I would like to eventually install a basic turbocharger on it. I think I need a knock sensor for that. What is the most easy and cheap way to get a knock sensor on this engine? One more problem is I have a ridiculous oil leak that looks like it is coming from the rear main seal. It's losing several quarts a week and I'm getting tired of putting oil in it plus it needs to be fixed before I can put a turbo charger in it. It has a new high volume Meling oil pump and I have lots of oil pressure, 40 psi idling warm 60psi while driving, so the engine seems pretty solid. How hard is it to put in a rear main seal and any advice on that? I had no idea this guy was going to half ass everything like he did but I'm kind of stuck with it and I would like to make it right. Is there anything else that would cause a leak that looks like it is from the back of the engine close to the transmission underneath? Thanks

[@Sdpartscenter]

You'll need to remove the transmission, torque converter and flywheel to gain access to the rear main seal plate. If the harness is still there, you might be able to run some knock sensors on the outside of the block if you have room and might be able to find a hole to tap the right thread for the sensors. It would be recommended to find a good shop to take care of both of those issues especially if you're losing as much oil as stated. It's one of many reasons we usually recommend finding a good gen 4 block because of all the extra work involved of making a gen 3 work in a gen 4 vehicle.

[@actionjksn]

@@Sdpartscenter I didn't know anything when I was buying the engine and the guy lied to me about everything. I don't have the money to replace the engine again, I'm stuck with it. I don't have the money to pay a shop now so I'm going to have to figure it out on my own. The guy who sold me the engine said it was compatible. His brother in law had the crank sensor done and put it together and installed the engine. I'm wondering what he did wrong to cause the severe oil leak. Maybe reused the old seal? I didn't even know a rear main seal could possibly leak that bad. BTW I told him if he needed to replace any parts I would pay for them, so there's no excuse for not replacing the seal. This has been well over a year ago so I'm stuck with this thing. If I could get these two problems with the oil leak and the knock sensor sorted out the engine runs really well. It runs smoothly and doesn't miss out. It does lack power on the low end which I suspect is because the timing is not being advanced with it not having knock sensors. But that's just a guess I don't know for sure. I'm guessing this is going to behave similar to an older engine that doesn't have a functioning vacuum advance? I'm not even sure where to look to see if there is a wiring harness for the knock sensors. If I could find it I could probably tap the side of the block for the knock sensors. Thanks for the reply.

[@jamesbiser4518]

Hey crazy question swapping a gen 3 motor into a gen 4 vehicle the opposite of what your doing

[@Sdpartscenter]

Then you'll have to change the reluctor and update the cam sprocket to that of a 58x setup. All in all, it's easier to just get a Gen 4 engine than it is to go through the hassle and machine work of trying to make a Gen 3 work on a Gen 4 pcm.

[@DurkinDurks]

i got a 07.5 silverado gen 4 with failed afm lifters. im currently looking at a 450hp crate motor 5.3 also but its gen 3, any tips on the swap?

[@Sdpartscenter]

You'd have to disassemble the engine and change the reluctor wheel to start with. We recommend finding a gen 4 right off the bat.

[@DurkinDurks]

@@Sdpartscenter any recommendations on similar gen 4 motor with similar power (450hp) and price ($4000) without AFM?

[@chrishansen7004]

@@DurkinDurks just change the lifters to something like ls7 lifters and swap a bigger cam in there's nothing special about that 450hp motor it's basically just a 5.3 with flat tops and their stage 3 truck cam, your gen 4 has flat tops and better cylinder heads put that cam in and you'll get the exact same thing

[@rockabichebel]

hello how are you plz i wanna ask you u have my hummer h3 2006 v5 3.5 i wanna swap to v8 6.0 wich one is better and no need too much electric wirking gen 3 or gen 4 ?

[@Sdpartscenter]

The hummer inline 5 is going to be limited by the aftermarket and will be the more difficult route. You will of course have to do quite a bit of wiring and harness work to make the V8 work properly.

[@oldschool337]

Do you think there is an adapter so u don’t have r drill and tap the black

[@lifeishard1211]

probably not

[@jamarcusgaines2611]

Wat about vice versa

[@colinw7205]

I have told that the Gen 4 aluminum blocks are stronger than the Gen 3 blocks. Is that true??

[@Sdpartscenter]

The Gen III blocks are plenty strong, but there are some improvements that make the Gen IV stronger, but not some crazy drastic improvement in strength, just a little stronger.

[@colinw7205]

@@Sdpartscenter Thank you for the quick reply. I am looking to do a twin turbo 1000 RWHP capable 5.3 liter street engine for my Pro-Touring '95 Chev. Caprice 9C1. A 5.3 liter b/c I want those super thick cylinder liners and extra mating surface area of the small bore VS the 4.0" or the a 4.062" to hold boost. Two I want the weight saving and heat dissipating properties of aluminum. So I moved my gaze from the L33 block to the LH8/LH9 block as a foundation.

[@darrellhughes6773]

So I hve a Lq4 6.0L 03yr cn I change to a 58x relutor wheel?

[@Sdpartscenter]

You can, but you'd need to of course remove the crank, remove the reluctor and have a 58x tacked on. Most of the time it is easier and more cost effective to just buy a Gen4 block and let it eat.

[@stephenhodge6441]

That clears up swapping newer engine to old computer but what about putting a gen 3 engine in a gen 4 vehicle. For example, let's say you have a gen 4 4.8L truck but have a built gen 3 LQ4 engine you want to swap in?

[@Sdpartscenter]

If you're going to run a standalone like a Holley Terminator, fire away. The Gen 3 would need a 58x reluctor added to the crank. You can't just increase a 24x signal to a 58x as there isn't a way to properly convert that signal and step it up unlike the Gen 4 engine on a Gen 3 computer wich takes the 58x and steps it down to 24x. You'd also have to find somewhere to mount the knock sensors on the side of the block. Then the cam signal. General rule of thumb there is just sell it to somebody for a good price and get a Gen 4.

[@somethingtowatchhere]

So with your engine build, you are using the 24x wiring and sensors?

[@Sdpartscenter]

For running a Gen 4 engine in a Gen 3 car, you use the 24x wiring harness, the gen 3 knock sensors (moved from the intake valley to the sides of the block), and the gen 4 cam sensor.

[@gmt400_k2xx]

So this will work putting a 3rd gen into a 4th gen truck?

[@Sdpartscenter]

Unfortunately no. You'll also need to either change the crank or install a 58x reluctor on the crank of your 3rd gen block. Many times it's easier to just sell the third gen and get a 4th gen block.

[@solophantasies]

Can i put a gen3 5.3 into a 2015 suburban?

[@Sdpartscenter]

Just reread this, sorry but no. You can't run a Gen 3 in a Gen 5 vehicle unless you run a standalone ECU AND you're taking a giant horsepower hit.

[@showtime302]

There you go carburetor and done

[@krazobuildz7567]

So Can a GEN 3 5.3 iron block be turned into a GEN four ?with all accessories from lh6 gen 4 aluminum block

[@Sdpartscenter]

Usually with the amount of work involved (including changing the reluctor ring on the crank), you would be better served to just get a Gen 4 and sell the Gen 3 to recoup your losses.

[@krazobuildz7567]

@@Sdpartscenter Will see that’s where the problem occurs because the LH6 GEN4 block is shot and that’s the aluminum block so I was trying to find a cheaper way around but I’ll just have to get me a GEN four iron block

[@derrekpatterson8171]

What of your puting a 2005 6.0 gmc sierrain a 2008 gmc sierra 5.3

[@Sdpartscenter]

The only way is to swap the reluctor ring and cam gear to the newer style.

[@derrekpatterson8171]

I got crank out of my 5.3 with new bearings and high volume oil pump.I just heard you say a new cam gear.i had it flashed and it runs great but they had to work around a sensor and sometimes doesn't start right up it cranks awhile.I still have 2005 cam gears.o well.Next next weekend.

[@Villa125]

Why did the ls1 have a constant problem with rod knock is it the main bearings did they change ? Or the rods ? Asking so I know what to get in terms of reliability? Ls1 or ls3?

[@Sdpartscenter]

The piston slap was evident in some LS1s on cold starts that was just the name of the game back then. An LS3 is going to start you off with an engine with more baseline power, and fresher components. It might be a little more investment right off the bat, but the LS3 is a great foundation to build from.

[@Barf98]

Can I put a gen 3 in my gen 4 09 truck ?

[@Sdpartscenter]

If you absolutely have no other choice, yes, but you'll have to disassemble the engine and change the reluctor wheel to start with. It's usually easier to just sell the good Gen 3 and start with a Gen 4 anyway.

[@Barf98]

@@Sdpartscenter is that it see o bought a gen 3 to fully rebuild for my truck but then a shop around me said I couldn’t use it and that I couldn’t chang anything to use it

[@Titoo.1]

Man, I'm fucked. I have a gen 4 5.3 with 30k miles. And a gen 3 5.3 with nice heads Lifters cam etc etc. Idk I want to swap blocks pretty much

[@BuiltDifferent13]

if u have Gen 3, especially 99202. why would you do anything? why would you want to put a newer late model hunk of garbage in there? build the lm7/lr4/lq4

[@Marc_Wolfe]

Blue Green used the 58x. But sure, the confusion started after that...

[@IsaacHolton]

So I have a 07 Escalade that previously had the 6.2 engine that had a 58x reluctor and I’m swapping to a 5.3 that is gen 3 which has 24x reluctor is there a way to make this setup work with original pcm and harness that came with the truck?

[@IsaacHolton]

So I have a 07 Escalade that previously had the 6.2 engine that had a 58x reluctor and I’m swapping to a 5.3 that is gen 3 which has 24x reluctor is there a way to make this setup work with original pcm and harness that came with the truck?

[@IsaacHolton]

So I have a 07 Escalade that previously had the 6.2 engine that had a 58x reluctor and I’m swapping to a 5.3 that is gen 3 which has 24x reluctor is there a way to make this setup work with original pcm and harness that came with the truck?

[@IsaacHolton]

So I have a 07 Escalade that previously had the 6.2 engine that had a 58x reluctor and I’m swapping to a 5.3 that is gen 3 which has 24x reluctor is there a way to make this setup work with original pcm and harness that came with the truck?

[@Sdpartscenter]

The only way is to disassemble the Gen 3 and put a 58x reluctor in it and run a cam with a 3x sprocket. Otherwise, sell the Gen 3 and find a Gen 4. You can step down a 58x crank signal to 24x, you cannot step-up a 24x signal to 58x.