Spedie wrote on 04/28/16 at 10:15:43:I got the top of the battery box off on the left hand side to expose the negative lead. I had to buy a number 1 GearWrench to get it off. I don't know why they call this tool such a thing. The gear wrench is basically a phillips on one end and a straight screwdriver on the other - with a 90 degree bend on both ends.
Sounds like a Gear wrench brand offset screwdriver, phillips / straight
the actual tool called a gearwrench is a combination wrench with a box end that ratchets, like a socket wrench, or that was the original tool they introduced, the brand now make all sorts of tools
I have a full set of early stubbies like that, made by matco, my shop foreman had the actual GearWrench brand
almost impossible to get the thermostat out of a 95-2001 Lumina with the 3.1 V6 without one of those babies in 13 mm IIRC