Canadian Auto Workers President Buzz Hargrove has said General Motors' plans to axe 1,000 jobs at an Ontario province truck plant are a shocking indication of what's to come.

The automaker plans to cut one shift of production of Chevrolet Silverado and GMC Sierra pickup trucks in Oshawa, Ontario, reducing output to two shifts from three for the first time since the early 1990s, the Associated Press (AP) reported.

Hargrove told AP he expects GM and other Detroit-based automakers to continue downsizing and will ask the government to try to persuade GM not to make the cuts, the report added.