General Motors Co. has canceled plans to develop a plug-in hybrid vehicle based on the current Cadillac SRX crossover platform after deciding that the project was not financially viable, three people with direct knowledge of the project said.

While two of those people said the plans could still be revived on a future platform, they and two others familiar with the plans said engineers and others involved have been reassigned to other projects.

Reuters spoke with six people about the decision and they could not be named because the project was never made public by the company. GM officials declined to discuss the company's plans.

"I'm not going to comment on specific products or timing for applications, but we still see promise in the technology," GM spokesman Kevin Kelly said.