Help !!! 97 deville

The other day my serpentine belt came off.when trying to put it back on i found that there is a single pulley between the a/c comp. and air pump that is bolted into the engin block.well the bolt broke off and the pulley is gone,leaving part of the bolt in the block..there is little room between the block and unibody to drill out bolt.... Any ideas on how i can fix this myself....help thank you. 97 deville northstar

You will need to remove what is in the way and have the proper tools to remove the broken bolt this is not a job for a " dyer' unless you have the skill/backround.