The vehicle was driving and lost all power and came to a stop. After about 5 seconds vehicle regained power. The ‘check engine light’ illuminated on the dash. took to dealer and stated could not replicate problem. Only have the report from vehicle computer and the EV technician did not understand the information and had to call GM for help. Got car back and problem happen again. Dealer had GM specialist out to help. GM reset computer and problem just happens again.