Garden tool by day, GM fastener removal tool by night.

 

Here's the tool in action:

I have discovered that because this tool is so long it puts a bunch of power on this little plastic fastener (& the metal fender tab). I was trying to pry out a stubborn clip & it wasn't coming out. The (thin) steel tab was bending. I now just use the tool to get the space needed to cut the old clip out. I just use a new one during re-assembly.

 

Nice tip! Thanks for the info.