To study the seismic performance of T-shaped fully precast shear walls with vertical reinforcement connected by sleeve grouted lapping connectors (referred to as APC connectors), quasi-static tests were conducted on one cast-in-place wall and two pieces of precast wall based on type I and type II sleeve grouted lapping connectors. The results showed that the initial horizontal cracks of the cast-in-place wall appeared at the top surface of the foundation, and the initial horizontal cracks of the precast wall appeared above the sleeve due to the restraint of the concrete by the sleeve. In the limit state, the specimens were all flexural-shear damage. In the cast-in-place wall, concrete crushed and rebar flexed at the edge of the footing, along with buckling of the rebars. For the precast wall, failure was characterized by buckling of the rebars above the sleeve, concrete crushing, and spalling of the concrete outside the sleeve. In terms of cracking load, yield load, peak load, stiffness, ductility and energy dissipation capacity, precast walls with type I sleeves were comparable to cast-in-place walls, while precast walls with type II sleeves were greater than cast-in-place walls. Both types of sleeves remained elastic during the loading process of precast shear walls, and both were effective in transmitting reinforcement stresses. The out-of-plane displacements of the precast specimens accumulated in the negative direction during loading, but the absolute values of out-of-plane displacements of the prefabricated walls were comparable to those of the cast-in-place walls at the same load level.