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Manufacturers have engineered high voltage batteries and highly efficient electric motors that have been combined with an internal combustion engine (ICE) or in some cases, replaced the engine altogether. While this advancement is beneficial in many ways, service technicians are faced with new challenges in servicing high voltage vehicle systems. Although highly trained in many areas, today's automotive and commercial vehicle service technicians traditionally have not been trained to work with high voltage (HV). To ensure proper and safe HV service, information and training is critical. This paper will highlight some typical safety precautions and service procedures directed by manufacturers, such as the use of high voltage insulation gloves, proper tools needed and the practices of performing HV disabling procedures including zero voltage checks.