You assume since GM is not mimicking Tesla, that they are lost when if comes running a car company. I'm not sure.
Tesla's losses per car delivered have climbed every month since July 2016, hitting a new record high of
-$26,200 per car for 2018.
Tesla: vehicle deliveries by quarter 2018 | Statistic
So Tesla's are an excellent buy. Would GM sell more Bolt EVs at $11,300 MSRP ($850 after rebates in California)? Maybe, maybe not, but that has nothing to do with the Bolt program. It is targeted at being the first EV sold at a profit in the US. Is it profitable yet? Nobody knows, so I would assume 'not yet'.
There is a difference between how much a car company makes (or loses) overall per car sold and whether the company is selling the car at a loss. Tesla's gross profit per car sold is better than every major competitor in the business. They overall lose money because their fleet sales are not enough income to cover expansion and R&D. Tesla has had profitable quarters when they pulled in their horns and focused on selling cars. If they stopped expansion and R&D, they would be quite profitable, but that would be very short sighted and would hurt the company down the line.
On the other hand if a company is losing money per car, ie it costs more to build the car and get it delivered than they can make selling it, the company has a product that is not really viable unless it has some other benefit. Most of the EVs sold by mainstream car makers are compliance cars that cost more to make than they can sell them for and they only sell them because they have to by law in some states.
It's estimated GM loses about $7K to $10K per Bolt. That is it costs GM more money to make the car than they get selling them. It's unclear whether that includes the amortized costs of R&D of the car over the expected production run. If it includes R&D costs GM may be thinking that follow on projects will have a shallower R&D hill to climb as they leverage tech developed for the Bolt.
Tesla makes money per car, but loses money overall because they haven't sold enough cars (and solar installations) per year to cover their other expenses. Elon has been stating that Tesla will become profitable and remain profitable once Model 3 production hits stride. I've done some back of the envelope calculations and I'm sure he's right.
All other EVs appear to lose money per car. The companies can cover the losses with ICE sales which dwarf their EV sales and are generally quite profitable, but they are reluctant to scale up EV production because they can't figure out how to make money selling EVs.
Because Tesla is not overall profitable yet, the common consensus about the car industry people is that EVs can't be made at a profit right now. When Tesla becomes profitable and stays profitable, that will destroy that notion and could cause an existential crisis in the industry.
50% of a Tesla is imported, and Panasonic is not domestic. Tesla could be one temper tantrum away from having no batteries, much like how they lost all Autopilot functionality for period after a dispute.
There are a couple of different measures of how "American" a car is. Canada and US sourced parts are usually lumped together and Mexico sourcing is a separate line. Under NAFTA the total sourcing for parts from all three countries is important for determining whether they get slapped with a tariff or not in Canada and Mexico. Then there is whether the car's final assembly is in the US or not.
I can't find the window sticker from my car, but the Model S stickers posted online say 50-55% US/Canadian content with no mention of Mexican content. Model X stickers are similar. Model 3 stickers say 50% American and 25% Mexican.
Teslas are among the most American content cars. The highest is the Toyota Camry at 78% NAFTA sourced parts, so the Model 3 is very close.