Posts Tagged: gm charging system problems

GM Charging system problems: Understanding the EPMS system

Learn how to diagnose and fix charging system problems on  GM vehicles The charging systems on late-model GM vehicles are quite different from older stand-alone alternators with internal voltage regulators in prior years. If your GM vehicle has charging system problems, you must first understand how they work before you can diagnose the problem. Plus, you must use a scan tool to determine the root cause. If you don’t, you’ll wind up replacing perfectly good parts. The new GM charging system is called the Electrical Power Management System (EPMS). It’s … Read More