REPLACING NEGATIVE BATTERY TERMINAL

The large one goes to the engine block and the little one goes to the sheetmetal of the right wheelwell. Those little ones often pull loose such that you can't imagine where it came from, it was a 5/16" headed screw into the sheet metal.

There is also a couple of bare naked ground cables that also grounds your transmission with your starter and vehicle frame close to the starter. If these get pulled in two when changing out an engine for example you will get all kinds of odd blinker problems, gauges reading off the chart full and then empty, you will swear the thing is possessed.

You could make your own and add it into the GM grounding system already in place. Bolt the big end to the block, put a screw thru a handy frame hole where ever it lays across one and finish with a smaller self tapping screw right into the fender well right thru the cable.

THE BODY