I've got a better question, why is this question in the Chevy venture forum ?
It is the round pump that you will see under the cowling in front of the left tire. It is approx 6 in in diameter.
The injection pump crank sensor is internal to the injection pump. It is not serviceable.
the fuel pump is in the fuel tank
Yes
One
It is on top behind the driver side of the radiator in between that and the engine... Real easy to find if you get in there and look
The fuel pump relay on a 2001 Chevrolet Tahoe is located underneath the hood area. It is in the power distribution box.
Secondary air injection pump is located right on top/front of your engine. Its a black pump which should have a aluminum bracket holding it on. Just one inverted torx bolt and the electrical connection
It is next to the ECU under the hood (black plastic box on the driver's side)
Yes, the smog pump is correctly called an air injection pump. It pumps air into the exhaust when forst started to help the cat warm up.
it is in the fuel tank
yes