how to fix sticking fuel injectors,,,,car has 135,000 miles

How do you know that the injectors are sticking, because if they were sticking open there would be gas spraying out of the tail pipe or the car would not run at all if they stick closed. Who told you it was sticking injectors? You may just have a vacuum leak or sticking EGR valve (if equipped) or many, many other things going on with your Chevy. I would get my car scanned by a real shop, not a parts store, and then you will know what is wrong. here are some shops: https://repairpal.com/chevrolet-repair-in-jonesboro-arkansas