I have a 2004 Ram 2500 4x4 Laramie QC. Does anybody know for sure what part #s on the FCM/BCM are interchangeable or do they all need to be programmed per vehicle(options). I was thinking I needed to change exact original part #(56051036AD A) for the same part #(56051036AD A)but is this true? Iv heard some people changing out with different part #s and fixing problems but don't know if they had any programming done. Maybe this isn't even a progammed part in the first place, I don't know.

Thanks!!