Engine swap puting an 06 5.3 into an 07.

jacobsprad · September 15, 2021

Thank you. Swathdiver. I have a, very nice gen 3- 5.3. for the 07 Tahoe. Where would you suggest that harness from?

shakenfake · September 16, 2021

Lead me to that Swath cause I am a frequent flyer over there and have never seen that. I know there is GenIV to III but I have never seen Gen III to IV

jacobsprad · September 19, 2021

Ok how about replacing a lmg or flex fuel 07 with a ly5 . Would the exterior parts and the ECM/ harness plug and play?

CamGTP · September 20, 2021

You must have missed my post where I said you can already do that.

jacobsprad · September 20, 2021

Ok I repeat. What is needed, to change from 07 flex fuel to 07 non afm anon flex fuel. Is it just a flash of the computer?

shakenfake · September 20, 2021

Why are you getting rid of flex fuel? All you need is a sensor to keep it.

To do non AFM you need new lifters and new camshaft.

Tune is required

jacobsprad · September 20, 2021

I have an 07 non afm/non flex fuel motor with a build. I would like to put it in the afm/flex fuel 07 Tahoe. Is just the flash of the computer needed?

shakenfake · September 20, 2021

I just answered that question....

Is your 07 a Gen III or IV?

CamGTP · September 20, 2021

GM did not make a non AFM/DoD engine for 2007 new body style Silverado/Tahoe/Suburban/Yukons.

If the other 2007 engine you have has the camshaft sensor located behind the intake manifold by the oil pressure switch and has the knock sensors under the intake manifold, that engine will not swap into your truck.

In 2007 they did make both 5.3's for the Silveado/Sierra Classic body styles and those are GEN 3 engines and not GEN 4 like you require.

swathdiver · September 21, 2021

On 9/15/2021 at 7:28 PM, jacobsprad said:

Thank you. Swathdiver. I have a, very nice gen 3- 5.3. for the 07 Tahoe. Where would you suggest that harness from?

On 9/16/2021 at 9:18 AM, shakenfake said:

Lead me to that Swath cause I am a frequent flyer over there and have never seen that. I know there is GenIV to III but I have never seen Gen III to IV

Whenever I have said that it cannot easily be done, someone corrected me. My eyesight does not permit a search but I do remember that in the interim period, there were Gen IV motors with 24x crankshafts.

4 hours ago, CamGTP said:

GM did not make a non AFM/DoD engine for 2007 new body style Silverado/Tahoe/Suburban/Yukons.

If the other 2007 engine you have has the camshaft sensor located behind the intake manifold by the oil pressure switch and has the knock sensors under the intake manifold, that engine will not swap into your truck.

In 2007 they did make both 5.3's for the Silveado/Sierra Classic body styles and those are GEN 3 engines and not GEN 4 like you require.

Well, GM did put the 4.8s in the early Tahoes and they did not have AFM. LY2 and the later L20 with VVT. Then of course in 2009, the mighty L9H made its appearance and it lacked AFM as well and was a VVT engine.

As you already stated, the OP could simply take the Gen III block and heads and use everything else from the original Gen IV motor to make this work. He might need larger injectors depending on power output. He'd have to move some sensors around and if memory serves there are fixes for that as well.

jacobsprad · September 21, 2021

Thank you again swathdiver. If you would come across those pages of what you speak, is be interested to check it out.

shakenfake · September 21, 2021

I have never heard of a Gen IV with a 24x reluctor wheel. It doesn't particularly matter because the cam sensor is still a 4x in Gen IV so there is another boundary.

Either way OP needs a Gen IV engine and there is no argument there.

swathdiver · September 21, 2021

13 hours ago, jacobsprad said:

Thank you again swathdiver. If you would come across those pages of what you speak, is be interested to check it out.

You also mentioned swapping in an LMG where an LY5 was before. You could do that and keep your original injectors and not have to do anything else besides the AFM delete. You could "add" the FlexFuel capability to your truck by changing out the fuel pump assembly and updating the tune to the LMG version, along with deleting AFM.

I'll look later for those posts and see what I can find.

swathdiver · September 21, 2021

13 hours ago, jacobsprad said:

Thank you again swathdiver. If you would come across those pages of what you speak, is be interested to check it out.

5 hours ago, shakenfake said:

I have never heard of a Gen IV with a 24x reluctor wheel. It doesn't particularly matter because the cam sensor is still a 4x in Gen IV so there is another boundary.

Either way OP needs a Gen IV engine and there is no argument there.

Ok, my memory has not been good lately, I found this thread which is where I believe the information came from. There's also a guy on there saying to quit saying it!

https://www.performancetrucks.net/forums/gmt-900-trucks-general-discussion-188/gen-4-lq4-gen-4-truck-557065/

Then I did a google because I thought I remembered adapters being made and came across ICT Billet and Speartech. My eyes can't take much more computer so you have to check out the pages and such Jacob.

https://www.ictbillet.com/swap-guide/ls-swap-guide.html

https://www.speartech.com/product_p/24xgen4.htm

On this photo, check out the bottom right Wire Adapters.

Bemeup · July 13, 2024

On 9/10/2021 at 11:17 PM, CamGTP said:

No, you can't do that.

The 2006 is a GEN 3 block and the 2007 Tahoe engine is a GEN 4 block.

GEN 3's are 24/1x crank trigger, the GEN 4's are 58/4x crank trigger. The knock sensors are in the valley cover on the GEN 3 and the GEN 4's are bolted to the side of the engine block down by the oil pan. The camshaft sensor is by the oil pressure sensor on a GEN 3 and in the front timing cover on the GEN 4. Those are just a few of the major differences in those engines.

That’s all true but they do make new triggers and knock sensor adapters eliminating that issue it’s very possible. done it