This is my detailed procedure for easily replacing weak or failing lift struts on tailgates and is the same for lift gates, hatchbacks, trunk lids, and hoods. These gas charged devices are also called lift supports, shocks, and strut arms whose purpose is the support the weight of the liftgate and make it easy to open and close. Be sure to have a helper hold the weight of the door or use something sturdy to prop it open like a long piece of wood or a step ladder. For a few dollars in parts, why pay someone else do it when you can do it yourself!