General Motors Corp. (GMGMQ) plans to transfer production of the GMC Sierra Hybrid pickup truck to its plant in Silao, Mexico, from a facility in Oshawa, Ontario, a company spokeswoman said Monday.

The Mexican plant already produces the Crew Cab version of the Sierra, with a non-hybrid engine, as well as several other models of pickup trucks, the spokeswoman for General Motors de Mexico said.

She said further details on the move, including production numbers, should be available next month.

General Motors' Mexican operations haven't been directly affected by the company's U.S. Chapter 11 proceedings.

Last week General Motors said it will idle its plant in the north-central Mexican city of San Luis Potosi for seven weeks this summer to adjust for weak demand. Its three other Mexican auto plants - in Toluca, Ramos Arizpe and Silao - are expected to continue operating normally.

-By Paul Kiernan, Dow Jones Newswires; (5255)5001-5726; paul.kiernan@dowjones.com