2016 Cadillac ATS Hitch Wiring | Harnesses, Adapters wwwd››Trailer Hitches›Hitch Wiring›Cadillac›ATSGet your 2016 Cadillac ATS outfitted to electrically connect to any trailer. Towing is simplified with our selection of harnesses, adapters, and connectors. 2016 Cadillac ATS Hitch Wiring. a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have a reliable connection.. 60" length Electronic 2016 Cadillac ATS Sedan Wiring Harness/Engine - GM Parts Giant GMPartsGiant offers the lowest prices for genuine 2016 Cadillac ATS Sedan parts. Parts like Wiring Harness/Engine are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2, 4 Cyl 2, 6 Cyl 3.