Is it true that Kamala Harris' real maternal grandmother died 4 years before she was born?

Commentator Candace Owens says that after a quick Google search, she was able to determine that Kamala Harris' grandmother, Beryl, died four years before Harris' birth. At minute 15:02 of the video Owens says, “I'm going to need proof that she's black” and at minute 16:17 that, “We just significantly and unequivocally debunked one of those photos.” Referring to photos of Harris with her grandmother in her autobiography titled in Spanish “Nuestra Verdad”.