[en] High-resolution Cl 2p^-1 photoelectron (PES) and Cl 2p^-1→3pπ^-2 normal Auger electron spectra (AES) have been measured using different photon energies. The PES and AES have been fitted simultaneously taking vibrational and electronic lifetime-interference terms into account. Detailed results are presented for the Cl 2p^-1→3pπ^-2 normal Auger transitions. The equilibrium distances, vibrational energies, and anharmonicities for the ¹Σ⁺, ¹Δ, and ³Σ^- final states are derived from the intensity distribution of the vibrational substates. The relative intensities for the different Cl 2p^-1→3pπ^-2 normal Auger transitions are also given. In addition to the Cl 2p^-1→3pπ^-2 transitions, some fine structures are observed that show a photon energy dependence. These structures are assigned to decays of doubly excited or shake-up/off states