DCC ready GP7 Diesel Locomotive

[ronnorviel]

The subject Locomotive runs the opposite way that the direction arrows point. It runs on the 10 address and I can't get it to change to another address. I thought it was a DC engine but when I unplugged the DC control it runs just fine but still runs opposite and won't change.  Any ideas?

[trainman203]

Did you buy it "used"?

[jward]

I'm a little unclear here. Is this locomotive DC or DCC?