Here we investigate the effect of the dual inhibition, in KRASG12C mutated NSCLC cells, using the KRASG12Ci adagrasib (MRTX849) and the pan-TEAD inhibitor (TEADi) K-975. We show that K-975 enhances adagrasib-induced tumor cell growth inhibition in cancer cells. Mechanistically, we detect a downregulation of MYC and E2F signatures and a downregulation of the G2/M checkpoint regulation, which result in the increase of G1 and the decrease of the G2/M cell cycle phases. These data suggest that the co-inhibition of KRASG12C and YAP1-TEAD leads to a specific switch in the mechanism of cancer cell killing.