Swapping Decks?
 

So I just bought a 2001, 4 door blazer and it's got a single din pioneer head unit installed. I have a similar but newer pioneer unit installed in my old truck.

Can I just straight up swap these two decks or are the wiring harneses different? I haven't pulled either out yet as I don't have time just wondering if somebody has already done this and can throw some advice my way.

Thanks for the help.

if the plugs are the same and the wiring is the same, go for it.