What is a PCM in a car? The term PCM stands for powertrain control module, and is a critical piece of equipment within your ...

Emission control systems in modern cars have slashed air pollutants such as particulate matter and nitrogen oxides.

But beneath that dry phrasing lies a radical shift in GM’s business model—one that could fundamentally alter how drivers ...

GM issued a very similar service update with an ECM fix for a fuel injector flow rate problem for 2019 – 2022 model-year ...