Thank goodness for this forum. I spent about 2 hours trying to figure out how to get to the latch to release it. I tried reaching under the hood with a long strip of thin wood, a wire, a bent piece of metal. Put the car up on the ramps, tried looking from underneath. Remove the fender side vent. Just when I was about to pull out my hair, I got smart and fire up the computer, and 5 minutes later (I'm a guy so it took me a couple of minutes longer to figure it out) the hood is up! My problem turned out to be the little plastic (why oh why does GM use plastic for this type of application?) clip near the driver side latch that holds the cable sleeve in place. I made a new clip using a piece of stainless from a household plumbing part, works great, and looks good too.
Thanks for your help. I have outlined the procedure for future use, as we all know this will happen to you some day.