The GMC Brake Master Cylinder Reservoir Cap 20760280 is a black plastic and rubber cap designed for the front placement on vehicles. It is a genuine part manufactured by GENERAL MOTORS, with interchangeable part numbers 42042 and 42072. The cap is made in Mexico and includes various OE/OEM part numbers such as 84502401, 84917020, and 22688449, providing a secure fit and reliable brake fluid reservoir function for GMC vehicles. Cap is from a 2005 2500 HD Sierra but does fit many vehicles!!
