Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
You would need a nut to push on the pulley while you hold the bolt. The real tool is much better and free to use. Some pumps do come with a bolt that will fit but you have to have the correct length and thread.
It is a friction fit on the shaft so look at the hub of the pulley to see if it cracked and there is nothing holding it but the friction
Let me know how I can help