Up until the late 1960s there was no such thing as a Buick brake caliper. General Motors clung to four-wheel drum brakes until long after they were out of date, and only introduced disc brakes on Buick vehicles, with the resulting Buick brake caliper arrangement, just prior to the dawn of the '70s. But, as with many GM innovations of the time, by the time the Buick brake caliper did become optional, it was well tested, reliable, and performed quite well. Variations of that early Buick brake caliper were used well into the 1980s, and the Buick brake caliper used on current Buicks with four-wheel disc brakes has changed very little. So, if you're wondering if you need a new Buick brake caliper, first you need to determine if your Buick has disc brakes. If it does, then checking for fluid leakage around the Buick brake caliper is the next order of business. Since your Buick brake caliper holds fluid under hundreds of pounds of pressure, leaks are not uncommon on older components. A leaking Buick brake caliper can cause uneven braking, brake fade, and even a loss of pedal pressure in extreme situations. If you find any sign of leakage or damage on your Buick brake caliper, replace it immediately. A replacement Buick brake caliper, whether you select new or rebuilt parts, is not particularly expensive-especially when you consider the danger you subject yourself and your fellow motorists to by driving with a malfunctioning Buick brake caliper.