Not certain of which engine manufacturer they will be using if not their own by General Motors.
Do they even have capabilities of producing an F1 V8 engine?
note: Nevermind, just checked and it is a 50/50 hybrid engine under the new rules instead of what was under speculation earlier about engines used.
This is why I was laughing earlier:
Ferrari engine and gearbox

But this is FIA, expect in 2030 to have a single engine provider just like with tyres.
I also think the same. Building your own engine is a tricky one. Especially if you are new in this sport.

This is just the situation for Audi.
Former Ferrari engineer in charge of it, so popcorn!!
And Red Bull... They are even an energy drink company. I'm really wondering how good their own engine will be.
It's made with Ford, so not entirely their own engine, and Ford knows more about racing engines than GM for example.