6.0 Swap Time!

[Echo]

I would probably replace the rear main seal on the swapped engine. That's one thing I wish I did on my 99 Silverado and I think it's starting to leak slightly (I just did the oil pan and pickup tube o-ring.) These seals start leaking with age and high mileage.

Probably I would do a complete seal kit since engine will be out: valve covers, valley cover, front main, rear main, oil pan, and pickup tube.

I have a complete gasket and seal kit for the 6.0. Everything is getting replaced in that respect. I know the oil pumps can be a later problem as well, so i'll be replacing that too.

 

[Echo]

6.0 arrived today. Unfortunately, the ignition coils and wires were damaged in transit. It appears to have a fuel return, but i'm not sure.

Are the 5.3 wires and coils interchangeable with the 6.0?

 

[Mudsport96]

Yes they are. And if they worked fine before, I would continue using them as they are a known working part. And not an unknown used part.

 

[Mudsport96]

And, I would continue that line of thinking with the injectors and fuel rails. You know yours are good as you have driven that vehicle and knew the engine ran.
Remove as many variables as you can during the installation to keep down the possible issues after reassembly.

 

[Echo]

I'm having a hell of a time finding someone to reflash the ECM. I tried talking to Flagship One about it. They told me it was not possible to reflash my 5.3 to operate the 6.0, or reflash a 6.0 to my VIN, and that doing so was illegal. I can't imagine that's even remotely true. Does anyone know of a business or individual that can do this for a reasonable price?

 

[strutaeng]

I'm having a hell of a time finding someone to reflash the ECM. I tried talking to Flagship One about it. They told me it was not possible to reflash my 5.3 to operate the 6.0, or reflash a 6.0 to my VIN, and that doing so was illegal. I can't imagine that's even remotely true. Does anyone know of a business or individual that can do this for a reasonable price?

@BlackBearPerf is a member here and can help you out...

 

[RAMurphy]

Yes you can update a 5.3 to a 6.0 - doing it now. Black Bear is doing it for me. Great company and well worth the upgrade.

 

[redhat9]

Having the calibration on the PCM adjusted to run the LQ9 should be very easy for any tuner. You can license your current PCM with HPTuners and copy all of the engine and engine diagnostic parameters from the same or similar OS from an Escalade calibaration. Biggest thing you'll want to keep is your injector data from your L59 calibration.

Additionally, if you have anyone local who has a J-box (J2534) tool and knows Universal Patcher/PCM Hammer, the calibration can be adjusted without any credit licensing.

Agreed with others who mention using your known good Coils and L59 injectors. Being a flex-fuel truck it should be returnless. The flex fuel injectors do have a higher lb/hr flow rate than a truck injector, so you have some room for growth if wanted. But I doubt you'd ever be bumping up against max duty cycle on plan gas/LM7/etc. injector.

Just word of advice, from factory, LQ9s do enjoy premium and are validated with it.

 

[BlackBearPerf]

I'm having a hell of a time finding someone to reflash the ECM. I tried talking to Flagship One about it. They told me it was not possible to reflash my 5.3 to operate the 6.0, or reflash a 6.0 to my VIN, and that doing so was illegal. I can't imagine that's even remotely true. Does anyone know of a business or individual that can do this for a reasonable price?

They are very much mistaken. We tune for that swap on a regular basis and would love to help you out.

 

[Echo]

They are very much mistaken. We tune for that swap on a regular basis and would love to help you out.

Awesome. I'll absolutely be going through you then. I appreciate all the help and advice everyone is sending my way.