If you have the patience, the spring can be replaced on your original, GM installed handle. It requires removing the handle, of course, and then dis-assembling the flapper from the rest of the handle. The spring wraps around a pin, which in turn holds the flapper to the handle. The pin has small crimps on both ends to hold it in, but they can be filed down to allow the pin to be removed. The spring is installed so as to hold the flapper in the "Up" position. When the spring breaks on either(or both) ends, you get a limp flapper.
I've replaced quite a few of the springs...I'm gettin purty gud at it!
Then again, the easiest solution is to get the cheesy "butterfly" springs that install in about 10 seconds from the outside.
If you do decide to get new handles, either now, or down the road, absolutely get the US-made handles. Cost more, yeah, but...the foreign-made handles are CRAP.
I stole yer pic, Ray...
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"