Save some of your anger for congress, which still (still!!) keeps the SUV loophole in the MPG regulations. (The same loophole which was originally supposed to apply to trucks and farm vehicles, but which SUV's have been driving through for 15 or more years.)
As for GM, personally, I believe investing in more fuel-efficient technology is just "thinking" not thinking outside the norm. Assuming that gas prices will remain artificially low forever, well, that can't be called thinking at all.