When a lower radiator hose O-ring fails on certain Chevrolet and GMC vehicles, the dealer often requires replacing the entire hose assembly. This Dorman OE FIX allows direct replacement of just the failed O-ring to save time and money. Please note: this O-ring is engineered to fit only the updated OEM radiator hose on specified vehicles; it will not fit the lower radiator hose that was factory-installed on 2014-06 Chevrolet and GMC vehicles.