Re: Possible to fit 2014 Summit headlights / LED DRLS into 2012 Overland Summit?
Welcome to Jeep Garage!
The 2014 JGC has a completely different electrical architecture than the 2011-2013 JGC, making it nearly impossible to do the swap. Could you make it work? Probably. But, you would have to make a ton of modifications and it would cost a lot of money. You are better off just upgrading to the 2014 if you really want the headlights.
By the way, that is an awesome Jeep! I almost bought a 2013 Overland Summit before deciding on my 2014 Overland. In my opinion, the Overland Summit is way better looking than the 2014 Summit, which is why I went with the 2014 Overland (once I decided I wanted a 2014) instead.
Current: 2015 Jeep Grand Cherokee Summit 4x4 -- Granite/Dark Sienna, 5.7L HEMI V8, Platinum Series Group, Skid Plate Group
Past: 2014 Jeep Grand Cherokee Overland 4x4 -- Granite/Beige, 5.7L HEMI V8, Quadra-Drive II, Advanced Technology Group