Posted by Andy B. on May 08, 02 at 21:38:56:
In Reply to: How about going from non-heated to heated? posted by BigBlackTahoe on May 02, 02 at 17:20:57:
It seems the general consensus over time on the board has been that any option not on the truck at delivery will be hard to add. After looking at the service manual for a couple of days, it seems that you would probably have to add circuits from the fuse panel all the way to the doors and rearview mirror. Don't forget that by the time you replace all three mirrors you are looking at close to a grand in parts, not counting labor.
One possible way to tell though is to look at the connectors to your current power mirrors now. If they have 8 pins you are good. If they only have four you are toast... Same applies to the rearview mirror.
HTH
Andy B.