Shuttle Bus Conversion - Mysterious Plug

[TripleBeamDream]

Just bought a 2012 Chevy G4500 shuttle bus. In the engine bay I found a 3 pronged AC cord. I wasn’t able to track it completely as it disappears deep into the engine

Any ideas of what it could be?

 

[sproutroot]

block heater.

also, I see you've only got three posts, so welcome to the club!

 

[TripleBeamDream]

Boom! Thanks for the quick reply. No doubt, I’m gonna start a build thread to track progress. Love this community