The battery module electrical connectors differ on the Bolt EV from those on other Hybrid and Battery Electric vehicles. GM-48571-62 is a pinout box adapter cable used with the previously essential pinout box GM-48571-A. The adapter and pinout box together enable individual cell groups of the Bolt EV to be checked with a multimeter at the CMA7 X1 and CMA7 X2 connectors, allowing for comparison with the GDS2 Scan Tool data and corresponding DTCs for proper diagnostics. The low-output cell group, or groups, can then be identified and appropriate repairs performed, which may avoid the need for replacement of the entire pack.