The Z-Flash T-Harness will only work with 2018 Ram 1500, 2019-2020 Ram 1500 Classic, 2018-2020 Ram 2500-5500, and 2018-2020 Dodge Challenger. This harness prevents you from having to remove the radio to access the security gateway and install a Gateway Bypass Module. Once your T-Harness is installed you will not need a Z-Flash Gateway Bypass Module. The T-harness works with the Z-Flash and all other OBD-II based products.