Kris.sundell

I'm one that likes a volt meter as well. While driving across country in my 2015 Yukon Denali, the voltmeter kept dropping, The vehicle was almost new at the time and I began wondering if my alternator was going out. If all else fails, read the manual. Here's what it said: When the engine is running, this gauge shows the condition of the charging system. The gauge can transition from a higher to lower or a lower to higher reading. This is normal. If the vehicle is operating outside the normal operating range, the charging system light comes on.