The Zone Offroad 5‑inch system for 2011–2019 GM HD trucks with overload and Fox components is listed as a full suspension kit for those model years. Described as the 5‑inch lift option that includes overload hardware and Fox‑series parts, the listing identifies the set as the vehicle‑matched suspension solution to achieve the specified ride height for the stated GM heavy‑duty applications.
Zone Offroad 11-19 GM HD 5in System w/ Overload Fox