Upgrade your classic Buick's cooling system with our high-quality Air Conditioning Thermostatic Switch, designed specifically for 1977-1978 Buick Fullsize and Riviera models. This O.E.M. replacement switch mounts conveniently to the evaporator near the receiver/accumulator, ensuring seamless compatibility and reliable performance. Unlike generic alternatives, our thermostatic switch restores your air conditioning system's efficiency, getting you back to enjoying cool comforts on hot summer days.