Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
These are often called a reverse torx bit.
I had to fix the column on my c1500 just this past fall and ran into the same challenge. I used an allen key socket instead. If you have a set of allen keys, find the right size to fit inside the bolt head. Take that allen key to the parts store and get an allen key socket.