2003 pontiac grandam coolant problem

My car is spitting coolant out of the overflow tube, as soon as I start. There is no pressure in any of the hoses. Could this be a problem with the cap?

blown head gasket probably

A cap is cheap enough to try,but, like Phantom said, sounds like a headgasket issue.

yep, when your pushing coolant out the overflow, that is a head gasket problem.

As soon as you start it? Even on a cold engine?

#1 cylinder is the usual culprit....