I have a bad back and use my heated seats summer and winter and I get heat on my lower back up to about 6 to 8 inches--just guessing, but definitely heat on part of the lower back. My current KL does have the vented leather which of course I never use the vents for cool air. I also have a 2015 Jeep Patriot with heated leather and I do feel some heat on my lower back on it too--pretty sure it doesn't goes as high as the KL--will check and get back to you on both of them.
Didn't realize you are a new member--so welcome to the forum and a great question.
2017 Trailhawk L Plus 4 bX4,Rhino exterior,Power 8 way drivers seat, Willys in windshidel,Cold Weather Group, Comfort/Convenience Group,Trailer Tow Group, 3.2 -Liter V6, Black Hood Decal , Uconnect 8.4 , Safety Tech Group, Leather Interior Group, Ventilated/Memory seat Group,Navigation. No hole in roof.
Last edited by ptram; 01-09-2017 at 12:09 PM.