The GM 3.0L Duramax diesel is a fuel economy champion and one of the best engines GM has built in years. However, it still has a known issue in the cold, which has not been fixed. GM 3.0L Duramax diesel known problem What issue am I referring to? The high fan speed after plugging in the truck. A few years ago, I discovered this issue myself with a 2023 Chevy Silverado 1500 High Country I bought for a longer review. According to the owner’s manual, I had plugged the truck in at below-zero temperatures. When I was ready to leave, […] (read full article...)