It’s based on past performance, and winter always brings a drop in miles per kWh, so the estimate goes down.
All normal as far as I can see

 

The "miles of range" or "Guess-O-Meter" number is just a guess that can change drastically depending on driving history and many other factors. Battery capacity is one of a great many things than can affect the GOM.

I'd be willing to bet you have not lost more than a couple kWh of battery capacity at 19,000 miles.

 

Feel free to do a search....been discussed a thousand times.

 

What do you guys think?

I think you should read the email you got when you registered here. It contained a link to THIS thread and you would have had your answer. Reading never killed anyone. Made everyone smarter, though.
@ARob can you close this 10001 thread on this same subject ?

P.S. After having my Tesla I understand now why posting the EPA each time instead of the number based on the previous driving was the right approach : no Tesla owner has this kind of questions.

 

P.S. After having my Tesla I understand now why posting the EPA each time instead of the number based on the previous driving was the right approach : no Tesla owner has this kind of questions.

Right, no Tesla owner asks these questions. Ignorance is bliss, eh? So instead, Tesla owners are suing Tesla for breach of warranty and fraud, alleging that the car can't go as far as the advertising and the range indicator said it could.

Personally, I'd rather have the car try to be accurate in its estimates, even if the estimates are not flattering. The GOM is a useful tool to plan charging stops and adjust my driving for the remaining charge. I can't fault the GOM for being truthful. I can fault GM for some of their user interface design decisions. The battery gauge should have shown a percentage, and it should be more prominent than the range estimates. The range estimates should be called out as estimates on the display. All of the confusion around the GOM is down to people not understanding what it's trying to convey.

 

Batteries don't hold miles, they hold energy. So you need to see how many KWH the battery is holding when it is charged to 100% to figure out if you lost any capacity.
People who buy EVS that don't know this really need to do their research before owning one. I suggest you look up Tom on State of Charge and Out of Spec Guides on YouTube to learn about charging and batteries and all things EVs.

 

It's not just using heat that brings down your range in the winter. The battery is less efficient in the cold. The Bolt does have a battery heating system, but it is fairly conservative compared to something like a Tesla. If you have your Bolt set to charge to a departure time, it will heat the battery up to around 60ºF. Warmer would probably be better for efficiency, but GM chose that temperature for some reason.

I'm not sure if your post was meant as a "humble brag," but you are getting some astounding economy no matter what. I drive for Uber, so I keep the interior at a comfortable temperature. My range in 30º-45ºF weather is usually around 180 miles at 87% charge. I just spent a week driving a Tesla Model 3 while my Bolt was in for service, and it was getting 4-4.8 miles per kWh in the same weather, and I certainly wasn't babying it! Driving up to 70 MPH on the highway and having a bit of fun with it (when I didn't have customers in the car).

 

As mentioned already, your question may be addressed by the stickied post in the New Member section linked in post #5 above. We will generally close new threads asking about the range estimate until the poster has indicated that they understand the information in that stickied thread. Afterwards, if you have a new question not addressed there, go ahead and start a new thread.