Cadillac was the GM brand moving away from combustion engines the fastest, but now that could be changing. GM has just announced a $275 million investment into its Spring Hill Assembly plant in Tennessee, and $150 million of that has been earmarked for a “future Cadillac internal combustion product.” The company has made it clear that it won’t be just a new-generation XT5 crossover, either. The plant will gain one additional model by the time the money has been spent. But what could that model be?
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