General Motors will add a third shift and 650 jobs to Spring Hill Manufacturing in Tennessee to increase output of the recently launched Cadillac XT5 and GMC Acadia.

General Motors said the shift is expected to begin in January 2017. Staffing details are being finalized and positions will be filled this quarter, according to the automaker.

The site manufacturing operations currently consist of a flexible vehicle assembly plant, including a body shop, paint shop, two polymer injection molding operations and general assembly, and an engine plant. There are 3,300 hourly and salaried employees at Spring Hill.

General Motors has announced more than $2 billion for the Spring Hill Manufacturing operations since 2010. This includes a $148-million investment announced in February to repurpose flexible machining and assembly equipment to build small block 6.2L V-8 engines for trucks. Spring Hill Manufacturing recently broke ground for the expansion of its engine plant, part of the $788.7 million investment announced in April.