The Invention provides Stable aqueous Pharmaceutical formulations comprising an Antibody anti PDL1 histidine acetate or SODIUM ACETATE, sucrose, Polysorbate. The Invention also provides methods for preparing such formulations and Methods of using such formulationsLa invencion proporciona formulaciones farmaceuticas acuosas estables que comprenden un anticuerpo anti-PDL1, acetato de histidina o acetato de sodio, sacarosa, polisorbato. La invencion tambien proporciona metodos para preparar tales formulaciones y metodos de uso de tales formulaciones