Get serious.

That's the message the head of the Canadian Auto Workers has for Chrysler.

Thursday, the union reached a tentative deal with General Motors.  It's very similar to an agreement they shook on with Ford earlier in the week.

Ken Lewenza says though Chrysler in "narrowing their difference", they have yet to present an economic proposal or pattern proposal that reflects what Ford & GM agreed to.

Both deals freeze pay, while giving workers lump sums payouts to account for cost of living increases & a ratification bonus. They also increase the time it'l take for new hires to reach the top of the pay scale & their pension plans will be tweaked.

Lewenza says sending Chrysler workers to the picket line is the "last tool" in the CAW's toolbox.

He says the easiest thing would be to "pull the trigger", but the union's goal & what Lewenza says is "the hardest thing", is to reach a collective agreement.

RELATED: CAW signs tentative deal with General Motors