"Global Warming" prostitutes have managed to bring about another change that is gonna bite ALL of us in the butts, financially. Remember when they told us the the "new" 134 refrigerant would save the planet, and we could do away with that nasty old R12? Sure you do...
NOW....apparently 134 ain't good enough...the planet is still goin to h ell in a handbasket, due to the 134 refrigerant depleting the ozone....
The solution? You got it...mandates fr a NEW refrigerant, R1234yf. This stuff will cost
10 times what the current 13 does. It also requires new equipment($$$$$$$$$$$$$) to handle, as well as new components on the cars, due to the flammability. You heard me...this stuff is flammable, and will require a "heavy duty" condenser to handle the very likely explosion, should it happen.
On top of all that, the stuff is NOT, I repeats, NOT retro-fit-able to older systems using R12 OR 134.
So far, they have not made any rulings/decisions on if current certified A/C techs will have to
start over on the certs....
GM will be he first domestic car maker to introduce this crap, in the 2013 line.
"Kids...Tell your Daddy 'Thank You'"....
THANKS DAD!!! 
R1234yf blurb
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Joel Adams
C3VR Lifetime Member #56 
My Link
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
