05 2500HD. stock mirrors are power adjust, folding, heat, reverse, turn signals.
can i swap out the extendable mirrors in there place and everything work happy, or will i need a different set of controls in the door panel?

ive seen several aftermarket ones that swap, but are not power folding or power extending.
are factory tow mirrors power extending?

i cant seem to find much on them.

 

The power heated signal towing mirrors were available from GM for the 2002-2006 trucks and SUV's. It should be plug and play since you already have the power mirrors. Check YouTube as there is a 5 minute video on how to replace them.