I have a 2001 2500 with the standard electric/heated mirrors. I want to swap to the trailer tow mirrors, but have been told by my dealer that the trailer tow mirrors with power and heat, which became available on the 2002 2500, will not work on a 2001 even though it is the same body style. Is this true? Is it a different wiring harness? Has anybody done this kind of swap before? Any help would be greatly appreciated.