How do you replace the antifreeze-coolant reservoir on a 1993 Buick Regal Custom?
Pop the lid off the reservoir and bend the metal ring that holds the tank against the fender away so the tank is loose at the top. At the bottom there should be two screws that just need to be loosened not taken out for the tank to slip upwards out of position. These screws may need to be acessed by removing the plastic cover that is beside the fuse block and extends down the side of the wheel well. If your car is like mine the hose is what needs changing not the tank itself. it will feel damp and swollen.