Serpentine belt diagrams install new belt &cost

The diagram should be under the hood. If you have a 3/8" socket breaker bar you connect it to the tensioner turn it to release the tension on the belt. The tensioner will want to spring back and apply tention to the belt. While you have the tension off you can slip the belt off. Once the belt is off you can release the tensioner and put the new belt on. Once the belt is back on almost you have to pull the tensioner back releasing the tension and slip the belt into it's final resting place and slowly putting tension back on the belt. The tension on the belt is extremely strong and if you are not careful you can smash or snap your fingers off when putting tension back on the belt if your fingers are between the belt and a pully. The cost of a belt is about $50 on most cars and you can do it in about 15 minutes with out taking anything apart. Look for a youtube video on Serpentine belt change on a Suburban or a Corvette it is the easiest type of car to do it on and will give you an idea of how to do it on a front wheel drive car which is a bit harder because of how the engine is placed under the hood. Same deal though with a tensioner and 3/8" socket wrench.