Quote:
Originally Posted by 70GMCBB
Make sure your negative battery cable ties directly to the engine block. I've seen it connected to an accessory bracket and sometimes directly to a head. If I remember correctly there is a ground strap on the back of each head connected to the frame. I've also seen a smaller wire from the negative battery cable at the battery going to the frame. This is a start anyway. I'm not sure but there might be ground straps at the back tail lights also.
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pretty sure the only ground wires at the back are on the side markers.
tails and reverse ground through the metal light bracket thingies.