how can i release the srepentine belt on chevy corsica 1995 3.1 v6l?

the square hole near the end of the tensioner is designed for a 3/8 ratchet. be careful when you pull counter clockwise( i think), becase when you remove the belt, the tensioner will unwind farther. watch you're knuckles. it's good, if you have the cash, to change the tensioner at the same time.
 
looking at the belt from the front, there is a tensioner pulley right by the alternator. Look closely and you will see a square hole. Place a 3/8 " socket wrench with no socket into the square hole and pull, this will loosen the entire belt
 
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