What happens when a GMC Yukon engine slows down?
What happens when a GMC Yukon engine slows down? As the engine/generator speed changes, so will the current (amperage) output of the generator. As a vehicle slows, engine/generator RPM slows and the current (amperage) output of the generator may not be sufficient to supply the loads, the vehicle system voltage will drop and the lights will dim. What causes the idle voltage on a GMC Yukon? Items that affect the vehicle's electrical system current and voltage at idle are the number of electrical loads being used, including add-on accessories, and extended idle times. Why are the lights dimming on my...