May 22 (Reuters) - General Motors Corp GM.N and the Canadian Auto Workers union reached a tentative agreement on Friday aimed at helping the teetering automaker's Canadian unit cut costs and qualify for long-term government aid.

Below are some of the details of the deal.

* Pension levels frozen until 2015.

* New hires will contribute C$1 per working hour toward their pensions. Existing employees and retirees will not have to make contributions.

* C$3,500 ($3,125) annual employee bonuses negotiated last May in lieu of lost vacation time filtered into pension plan.

* GM Canada commits to funding its pension plan on a solvency basis. Despite a shortfall estimated to be up to C$6.5 to C$7 billion, the union says upfront contributions and sustained commitments over the next several years will top up funding to levels comparable to Ford Canada (F.N: Quote, Profile, Research) and Chrysler Canada.

* A new independent trust fund to pay for retiree health care will be created.

* New productivity targets established for workers.

* Employees to make monthly cash contributions toward health care.