GM Genuine Parts Ignition Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. It increases voltage in order for the spark plugs to ignite the air/fuel mixture as the starting and charging system starts the engine, maintains the battery's charge, and provides power to the electrical accessories while the engine is running. A GM Genuine Parts Ignition Control Module features electronically welded lead connections to help reduce heat stress, failure, or cold joints. It has been laser trimmed to provide precise values and reduce deterioration and damage. This ignition control module includes a copper slug heat sink to help dissipate heat and create a more stable environment and it also features a large bus bar for added support and conductivity to address the installation and operating forces that stress terminal tabs. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).