Lh6 5.3 Parts Shortage!!!

[vintagesteel]

I scored an '05 LH6 from a Trailblazer Denali for my '51 Chevy project. The engine was delivered in good condition. If my research is correct I will need a computer, throttle and TAC(?) module. Do I need to search for these for the exact same year/model of vehicle or ??

[GasGuzzler]

There is no TrailBlazer Denali and if it's from a GMT360 or 370 the TAC functions are in the PCM. I have no patience to google it but is that an all aluminum 5.3? Should be if out of an Envoy Denali and you will only need the throttle and ECM, plus the wiring harness and APPS.

[vintagesteel]

Thank you and yes it is all aluminum AND out of an Envoy as you stated.(brain-fade on my part) I would now like to know what the APPS is please. The other half of my question is can I aquire these from other vehicles(years/models) or do they need to come from the same year/model vehicle?