GM 2014 - 2018 Coolant Reservoir Replacement KitCastle Manufacturing has the perfect solution for getting rid of that eye sore of a coolant tank in your engine compartment. This item allows you to remove your factory plastic coolant reservoir, and replace it with our aluminum unit. In return giving you much needed room clearance for running bigger wheels with your lowered, or bagged truck. Or if you just want a more eye pleasing custom look in your engine compartment, this is the reservoir for you.