2500hd 2009 wt
 

i like to add heated mirrors and defrost to my back window my truck is just a standard work truck want to convert it what should i do or how can i mak it happen

it won't be easy or cheap even if you do all the work yourself. you will need to replace the rear glass with one that has a defrost grid and replace the mirror glass. The wiring/connectors won't be there for the mirrors or rear glass so you will have to run wiring and switches. It is not worth the time or expense involved unless you have a donor vehicle imo.