All waste from daily operations is recycled, reused or converted to energy.
Move comes amid a continuing slump in sales of passenger cars generally in North America.
Four-year deal includes wage increases, signing bonuses and lump sum payments.
A tentative agreement will set a pattern for deals with all three automakers.
No GM product scheduled past 2019; much on the line as labour contract negotiations get underway.
This round of bargaining is really about solidifying the footprint in Canada.
Shutdowns also include assembly plants in Tennessee, Ohio and Kansas.
Production expected to grow by 2.5%; weaker loonie will increase profits to $2.3 billion this year.
The Canadian Engineering Centre will be looking for engineers from across Canada.
Union says operations will be more competitive with decline of the dollar.
Union accuses parts makers of lack of commitment; and trying to force concessions
Several hundred million dollars to be spent by 2016: watch for details.
The $99-million state-of-the-art General Motors of Canada Automotive Centre of Excellence (ACE) in Oshawa, Ont. is now officially open for business.