Typical repair can be completed in less than 30 minutes. No need to remove the gas tank for the check valve repair. Avoid replacing costly fuel pumps. Fits GM and Chrysler applications. Easy installation In tank electric fuel pumps have built-in check valves. When these fail, fuel that is supposed to be at the engine runs back into the gas tank, preventing the vehicle from starting. Installing the SRRCKV7 check valve eliminatesthe need toreplace the entire in tank fuel pump. This eliminates an expensive gas tank removal and repair.