Turn signal switch.
Just below the steering wheel inside the car, a little to the left.
Could be a problem inside the steering column
Yes, there is a trunk pop up on the right side of the steering wheel on the dash to the left of the pop up for the Fuel Cap.
Maybe there's a beehive inside of it.
Well, this is certainly among the strangest questions I've seen here. Is the buzzing from the headlight it's self, or is the noise inside the cabin?
You will need to have the codes checked for your steering system but most of the time the problem is a bad steering position sensor which is located at the bottom of the steering column on the inside of the car. I have seen defective YAW Rate sensors cause this problem but very very rare.
the steering wheel
It is probably not coming from inside the motor. What you probably have is a bad alternator bearing, steering pump bearing, etc.
That is the electric fuel pump that's inside of the fuel tank. That is a common problem with the Chevy trucks. A dirty fuel filter will cause the pump to make that noise or the fuel pump is wearing out.
Inside the gear box located at the bottom on the steering column.
Inside the power steering reservoir
the power steering is leaking were the lines run inside the boot on the driver side