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all serptine belt cars have a diagram sticker under the hood that cannot easly be removed, however if yours is missing, any NAPA

autoparts store or any parts store that sells gates rubber products , belts and hoses can give you a diagram from there belt catalouge. its in the front of there paper catalog

Are you sure there is not a diagram or picture somewhere under the hood on the engine block or near the top of the hood? I usual go to an auto parts store and pick up copy of a Chilton's or Haynes repair guide for my cars. They cost about $15 and are a good investment. You can also check your local library because they sometimes carry these books/manuals. Also take a picture or two of how the original belt loops around all of the pulleys and gears etc. You will need a tool to insert in the tensioner and apply torque to release the tension on the belt. You are supposed to be able to slide a nail or thin screwdriver through the tensioner pulley to keep it slack.

Try going to alldatadiy.com for manuals and diagrams.