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How to tell if engine heater is working?
Just purchased a 2023 Yukon XL Denali Diesel. It's cold here, it took about 10-20 minutes for the car to warm up. I tried plugging the car in for a few hours, but the warm up time seemed to remain the same. Is there any way to determine if the engine heater is operating? I didn't see any lights...- YukonDoItXL
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- Forum: 3.0L Duramax Diesel Discussion
