The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2005 and 2007. This motor also has the excellent 799, 243 heads installed. You also get larger valves than most of the 5.3L.
This is the desirable Aluminum block, if you are not boring or turbo-charging.
The aluminum block saves about 100 pounds.
The L33 used the 24x reluctor wheel.
You will need the matching computer to the reluctor ring, they do not interchange and software can't change this. Black crank sensor is 24 and I believe grey is 58
If you modify the motor don't forget to get it tuned at your local chassis dyno tuner. If you skip this step you may be leaving a lot of HP on the table.
The most straight forward approach would be to use an older P01 PCM (0411) programmed as a 2002 LS1 Camaro. This would get you the DBC, cooling fan.
Note; there are other options for the computer.
Confirm with the fellas at
https://bp-automotive.com/product-ca...wap-harnesses/
They will confirm and flash the ECM. Many companies will provide the ecm if you inquire.
Cheers