B1 Power Wagon

I have the opportunity to swap my RBB base radio with an RAZ radio. After swapping the head units, the RAZ works in my truck but my RBB does not work in the other truck; the unit powers up, but no sound.

The other truck has the Infinity sound system, my truck does not have Infinity and I only swapped the head units.

Do I need to swap something else (amp, speakers)? Is there a secret code I can punch into the head unit to get it to work? Do I just need to forget the swap altogether?

The other truck is about to be sold at auction so I need to get this sorted out pretty quick.

Thanks in advance!!