The company said the expansion was "designed to get the plant ready" for the vehicle.
"And sorry, we can’t yet tell you what’ll [sic] be," the post reads, in part.
It's possible the "future vehicle" is simply the next generation of the company's minivan, but Chrysler is mum on the construction, facility upgrade and potential new products.
"We are limiting our comments to what was in the release," spokeswoman Jodi Tinson said in a one-sentence email to CBC News.
In a followup email, Tinson said Chrysler does not comment on future product.
The company is spending close to $2 billion to retool, according to Unifor National president Jerry Dias.
The automaker started retooling and expanding its minivan facility on Boxing Day.
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New line is ergonomic
The company is using a 545-tonne crane to install 200 pieces of structural steel to create a new conveyor enclosure on the plant’s roof.
The enclosure will house the plant’s new skillet line.
The skillet moves the vehicle along the assembly line, adjusting its height to the desired level for workers, improving vehicle quality with a better line of sight, Chrysler said in a statement.
The skillet also provides optimal ergonomic positioning, which allows workers to function in the "golden zone," a 60-degree window in front of the employee, ideal to present parts.
The conveyor enclosure and skillet line are among many improvements planned for the Windsor plant. Additional projects will be completed during 14 weeks of downtime beginning in February.
No government investment
Earlier this year, Chrysler CEO Sergio Marchionne intimated upper levels of government had to come to the table with significant funding or risk losing Chrysler production in Ontario.
Chrysler stopped talking investment with the federal and provincial governments when the issue became, as he called it, "a political football."
Chrysler later confirmed the 2015 model year would be the end of the line for the Grand Caravan, but there was some relief when it committed to producing the new Town and Country minivan in Windsor.
Chrysler said in a media release in March that it would "fund out of its own resources whatever capital requirements the Canadian operations require."
Chrysler announced in May it will stop producing Dodge Grand Caravans.
Instead, the company will continue to build only its luxury model minivan, the Chrysler Town and Country, at the Windsor Assembly Plant.
Built in 1928, the now occupies 4.4 million square feet of floor space, and has 4,600 employees across three shifts to produce the Dodge Grand Caravan, Chrysler Town & Country, Ram Cargo Van, and Lancia Grand Voyager.
Its signature minivans went into production in 1983.