Got my 2015 PMC this past spring. The inability to disable the horn-on-remote-lock really annoyed me. Looked in the owners manual; the Uconnect 5.0 section says it can be done! Called FCA many, many times. Got a case manager assigned to me. Finally, after about 4 months, she informed me that my vehicle is missing the chip that would allow it to be disabled. This chip would be present if the vehicle had been ordered with an certain type of alarm. I asked for compensation due to the discrepancy between the owners manual and the vehicle (there are a couple of other things that are missing from the Uconnect system). Got some oil changes and my spare tire kit paid for.
Steve