DBW and Computer Issues

[rmvlt1100]

I am still having issues with my DBW setup. I was able to get the pedal to operate but still having idling issues and operational issues with the DBW setup.

I found the paper work for my 5.3L engine, PCM, TAC box and DBW pedal. The PCM and the engine are from a 2005 Silverado and the TAC Box and the DBW pedal are from a 2004 Silverado.

I have read through here that the mixing of the different years for these parts can cause issues with the operations of the DBW working properly and/or at all. If I have to replace the TAC box and the pedal assembly is it best to contact the dealer for new ones or does any one here know were would be the best place to get them? Any help and/or comments would be great.

Have a great day and thanks for any info;
Robert