As far as the 500m investment, small potatoes compared to the 3b in Fort Wayne and 1b in Mexico, where the new models will be built, and as far as the 72 hour change-over - GM would disagree with that.
Did you read the article? Headline is "GM plant in Oshawa won't produce redesigned 2019 GMC Sierra, Chevy Silverado".
Lead paragraphs sure make it look like the 2019 won't be assembled in Oshawa - unless I've completely lost my grasp of the English language.
UPDATED: 12/20/17 2:22 pm ET - corrected
Editor's note: GM is upgrading the consolidated line at its Oshawa assembly plant. An earlier version of this story referred to the incorrect line being upgraded.
General Motors Canada will indeed assemble the GMC Sierra and Chevrolet Silverado at its Oshawa plant, but they won’t be the redesigned 2019 models.
Instead, the plant will finish assembling and paint outgoing 2018 models shipped to Oshawa from Fort Wayne, Ind., for the foreseeable future.
Also, from the GM insider news:
http://www.gminsidenews.com/articles...019-goes-sale/
"GM Oshawa Will Build the Legacy Silverado, Not the 2019 Truck"
..and if you don't know what a "Legacy Silverado" is, it's the current model, which will be produced concurrently with the new model for the 2019 model year. - So post 2018, you will still be able to buy a 2018, it will just be labelled a "2019 Legacy Silverado" - but it's not the 2019 model.