99 rcsb swap questions
10-08-2015, 09:35 AM
#1
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99 rcsb swap questions
I have been wanting a nbs truck for a while now but the prices are crazy for them here. Anyway I recently picked up a 4.3 5 speed 2wd rcsb truck for my swap. I've been doing lots of reading on swapping a v8 in. I'm keeping the 5 speed for now. And I have decided on going with a l33 5.3 or a 6.0. My questions revolve around running the 03/04 and up motors in the 99-02 truck. I know there are differences in the engines as far as drive by cable and drive by wire. The reluctor count on the crank. So I guess my real question is, what will it take to run the 05 l33 5.3 in my 99 truck and same for the 6.0?
Last edited by Blt2tuk; 10-08-2015 at 12:15 PM.
10-08-2015, 10:59 AM
#2
I don't know the little facts here and there about wiring and making it work but you can run any 03-06 motor without an issue really.
Just use a 01-02 computer if you can (they have the better OS's) and the cable throttle body instead of the DBW stuff. The crank and reluctor count are the same, they didnt change the 24x and 58x thing untill the GEN 4 motors came out in the NNBS trucks.
Then just tune the truck for either the 5.3 or 6.0 with manual trans.
Just use a 01-02 computer if you can (they have the better OS's) and the cable throttle body instead of the DBW stuff. The crank and reluctor count are the same, they didnt change the 24x and 58x thing untill the GEN 4 motors came out in the NNBS trucks.
Then just tune the truck for either the 5.3 or 6.0 with manual trans.
10-08-2015, 11:46 AM
#3
An LMM is a Diesel 6.6L engine that is completely different from the LS V8's
Since you said it is a 5.3L its most likely an LM7.
We have a V6-V8 swap thread on this site assuming your working on a NBS GMT 800 truck.
https://www.performancetrucks.net/fo...-guide-378643/
Specifically to answer your question, The basic long Block will be the same. You will need an Oil sensor for a 99-02 engine as they are different from the 03-07 Classic.
Depending on your emission requirements in your area, you may need to swap the intake. 99 Had EGR for Sure and possibly Air injection. I believe it was an Option for a CA spec truck. If you don't have Emissions to worry about leave the intake and get a Cable TB for it.
You can use a cable driven TB but you will Need an engine harness from a 99-02 V8 truck.
You Should be able to re-use the PCM in the truck and have some one tune it.
Since you said it is a 5.3L its most likely an LM7.
We have a V6-V8 swap thread on this site assuming your working on a NBS GMT 800 truck.
https://www.performancetrucks.net/fo...-guide-378643/
Specifically to answer your question, The basic long Block will be the same. You will need an Oil sensor for a 99-02 engine as they are different from the 03-07 Classic.
Depending on your emission requirements in your area, you may need to swap the intake. 99 Had EGR for Sure and possibly Air injection. I believe it was an Option for a CA spec truck. If you don't have Emissions to worry about leave the intake and get a Cable TB for it.
You can use a cable driven TB but you will Need an engine harness from a 99-02 V8 truck.
You Should be able to re-use the PCM in the truck and have some one tune it.
10-08-2015, 12:14 PM
#4
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An LMM is a Diesel 6.6L engine that is completely different from the LS V8's
Since you said it is a 5.3L its most likely an LM7.
We have a V6-V8 swap thread on this site assuming your working on a NBS GMT 800 truck.
https://www.performancetrucks.net/fo...-guide-378643/
Specifically to answer your question, The basic long Block will be the same. You will need an Oil sensor for a 99-02 engine as they are different from the 03-07 Classic.
Depending on your emission requirements in your area, you may need to swap the intake. 99 Had EGR for Sure and possibly Air injection. I believe it was an Option for a CA spec truck. If you don't have Emissions to worry about leave the intake and get a Cable TB for it.
You can use a cable driven TB but you will Need an engine harness from a 99-02 V8 truck.
You Should be able to re-use the PCM in the truck and have some one tune it.
Since you said it is a 5.3L its most likely an LM7.
We have a V6-V8 swap thread on this site assuming your working on a NBS GMT 800 truck.
https://www.performancetrucks.net/fo...-guide-378643/
Specifically to answer your question, The basic long Block will be the same. You will need an Oil sensor for a 99-02 engine as they are different from the 03-07 Classic.
Depending on your emission requirements in your area, you may need to swap the intake. 99 Had EGR for Sure and possibly Air injection. I believe it was an Option for a CA spec truck. If you don't have Emissions to worry about leave the intake and get a Cable TB for it.
You can use a cable driven TB but you will Need an engine harness from a 99-02 V8 truck.
You Should be able to re-use the PCM in the truck and have some one tune it.
10-08-2015, 12:28 PM
#5
My post was supposed to say L33 (My phone auto corrected it for me). I am wanting to run the all aluminum L33 for my swap. I was planning on getting a harness from a 99-02 truck so it would all plug in. And I have read the v6 to v8 swap forum from front to back. I was just making sure I wouldnt run into problems with all the little things. As in injector plugs cam/ crank sensors, and other things. I am kind of on a budget so I am trying not to eat up time and money with little things. And I do not live in a place that requires emissions.
The only plugs that will be different, If you have a complete take out, is the alternator plug and the oil sensor plug. The old style 99-02 oils sensor was a single wire plug and is different from the later style 3 plug on the 05. The 99-02 alternator was a 4 pin plug model with 1 or 2 wires depending on the year and in 05 they went to a 2 pin model.
If it is a true L33, the cam and crank sensor will be the same.
No emission, all you will need is a cable TB and either stock Exhaust manifolds or some headers depending on how you want to go.
Don't for get the motor mounts as the V8 frame mounts are different from the 6 CYL.
Good luck with your swap.
10-08-2015, 02:19 PM
#6
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No problem, I figured being your first post and the type of question you asked that you may not know the difference. I was not aware you were posting from a Phone.
The only plugs that will be different, If you have a complete take out, is the alternator plug and the oil sensor plug. The old style 99-02 oils sensor was a single wire plug and is different from the later style 3 plug on the 05. The 99-02 alternator was a 4 pin plug model with 1 or 2 wires depending on the year and in 05 they went to a 2 pin model.
If it is a true L33, the cam and crank sensor will be the same.
No emission, all you will need is a cable TB and either stock Exhaust manifolds or some headers depending on how you want to go.
Don't for get the motor mounts as the V8 frame mounts are different from the 6 CYL.
Good luck with your swap.
The only plugs that will be different, If you have a complete take out, is the alternator plug and the oil sensor plug. The old style 99-02 oils sensor was a single wire plug and is different from the later style 3 plug on the 05. The 99-02 alternator was a 4 pin plug model with 1 or 2 wires depending on the year and in 05 they went to a 2 pin model.
If it is a true L33, the cam and crank sensor will be the same.
No emission, all you will need is a cable TB and either stock Exhaust manifolds or some headers depending on how you want to go.
Don't for get the motor mounts as the V8 frame mounts are different from the 6 CYL.
Good luck with your swap.
10-08-2015, 03:45 PM
#7
Thank you for the info. you answered all my questions pretty much. At least now I can order a motor and get started. I know there are a lot of the little things I will need considering its a v6 truck (fan shroud, frame plates, mounts, harness, etc etc..) like I said I just wanted to make sure there would not be little stuff that would add up in the end. A true L33 will be an aluminum block, flat top pistons with 243/799 heads correct?
243/799 heads are basically the same castings.
There was and aluminum LM4 5.3L Gen 3 LS engine as well as a Gen 4 LH6 aluminum 5.3 engine.
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10-08-2015, 04:07 PM
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