Hey Doug you might try this method that I have used on anchor bolts 1 inch to
2.5 in diameter. It works on nuts that are rusted and nuts that are overly
galvanized on galvanized bolts without damaging the hot dip galvanizing.
Just round up 2 heavy sledge hammers (6 pounds or more) and hold one of them on
the flat on one side of the nut and smack the opposing flat half a dozen times.
Move to the next opposing flats and repeat. Try your wrench after the 6 flats
have been struck. After a few go arounds the rust or what ever will be
displaced and the nut will move. If the nut stops moving repeat process till
free. This method will not work without backing hammer opposing striking
hammer.
Hope this helps, Nick WB7PEK
P.S. This also works well on the tapered studs on ball joints on your Chevys!
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