How would a thermostat only be changed on a 2005 chevy aveo ... I can't get the housing kit apart?

I bought a thermostat for my 2005 Chevy aveo... but my housing kit won't come apart for me to change the thermostat... any suggestions, without breaking it, it's made of PLASTIC!! GRRRR...



Thanx

Dani~How would a thermostat only be changed on a 2005 chevy aveo ... I can't get the housing kit apart?
The thermostat and housing are one unit, and are not serviced separately. If you have a t-stat that does not have the housing with it, you have the incorrect t-stat.