GM (NYSE, July 22 -- General Motors is returning gas-powered vehicles to the Cadillac lineup, ending the brand's brief positioning as an all-electric company and marking the clearest acknowledgment yet by a major American automaker that the US luxury electric vehicle market has not developed on the timeline that corporate strategy once assumed.

GM) confirmed the decision Monday, saying specific combustion models would be added to Cadillac's portfolio alongside its existing electric vehicles. The company did not announce model names or production timelines. Industry analysts expect GM to leverage existing truck and SUV architectures rather than develop new combustion platforms from scratch, given that its most profitable models, including...