I have a 2009 Silverado LTZ Crew cab. I would like to add the 2-way advance remote. Mainly for the extended range, but mostly for the piece of mind. I called the dealer and I'm getting different results on what I need. I have the rear defroster and not slide window which for some reason is a different add-on.
The site says with my setup I need part # 19171129 (which is the add-on with my options) and the dealer says I need part # 19213167 (which says not to use if you have rear window defrost)
So if anyone has went through this upgrade which one do I need.