I have a 2014 Silverado ltz with black perforated heated/cooled seats. When I bought the truck in December the seats cooled great even on 80 degree Texas days. The seats seemed to work great thru May of this year and could definitely notice the cooling effect. Now that is 105 down here in the shade these cooled seats don't seem to be working at all. Not even on days when its 80. I took it to the dealership and had them look at it and they said they were working normally it must be the type of clothing that I am wearing (What BS). I told him I wear Uniform work shorts that are exactly the same and it is not cooling. I got in it and drove it from the dealer and didn't notice any cooling at all. My friends Ford F-150 seats cool great, even in the Texas heat. Are the Chevy cooled seats just using cool air from underneath the seat and circulating it thru the seat (This is what the dealer told me) or is there actually a cooling element in the seat? I'm a little frustrated with this as I have already had it to the Dealership with no help.