In a press you might get it to budge.
In the truck your best bet is a big hammer, full size and stout punch for the pin, and an even bigger hammer and someone to hold it on the back side of the axle to add more mass to resist moving. Give it some good solid licks with the hammer and punch, small blows will only swell the pin and cause more trouble.
If no luck you may get by drilling but that can go bad quickly if not careful. Also don't expect to drill through the hardened king pin where it intersects the lock pin, and if you do catch it with the drill you will either dull or possibly break the bit.
Think too if the lock pin is that stuck you may need the axle out and in a press anyhow for the kingpins themselves.
Grigg
