Capital spending for vehicle assembly has averaged just $1.2 billion a year since 2010.
Unifor is waiting on a response from GM on the outstanding issues.
Proposal focuses on three long-standing issues – job security, economic concerns and contract language.
Unifor wants the automaker to designate the plant as the lead producer of the Equinox.
Unifor is demanding GM makes the Ingersoll, Ont. plant the lead for the popular crossover SUV.
CAMI losing GMC Terrain production to Mexico, but cuts related to Equinox changeover
Ingersoll, Ont. assembly plant to make next-generation version.
Canadian assemblers could lose more than 20% of their production by 2020: AutomotiveCompass.
Agreement includes a $3,000 signing bonus, full-time jobs to about 300 temporary workers.