The alternator on a Chevrolet Venture van is responsible for recharging the battery and converting the electrical power in the battery to a current that the components can use. The alternator is located on the front of the engine. Replacing it should not take very much time. The alternator can also be removed so it can be taken to the parts store to be tested. They can determine if the alternator is bad or if it is the battery.
Open the bonnet for access to the van's battery and alternator. Locate the battery at the front of the engine compartment. Disconnect the negative cable on the battery with a socket wrench. The negative cable is the black cable.
Locate the tensioner pulley under the alternator. Unscrew the bolt on the tensioner pulley to relieve the belt tension. Take the belt off the alternator pulley.
Unbolt the positive lead at the back of the alternator. Disconnect the wiring harness at the back of the alternator.
Unbolt the bottom bolt of the alternator from the rear brace. Do not remove the brace.
Unscrew the bolt holding the alternator to the remaining brace. No need to remove the brace.
Unbolt the remaining bolt from the mounting bracket. Pull the alternator out of the engine compartment.
Place the new alternator into the engine compartment. Bolt the alternator to the two braces and the mounting brackets with a socket wrench.
Bolt the positive wire to the back of the alternator with a socket wrench. Push in the wiring harness to the slot in the back of the alternator.
Slide the Serpentine belt over the alternator pulley. Tighten the tensioner pulley by tightening the bolt on the tensioner pulley.
Connect the battery by attaching the negative cable to the negative terminal. Tighten the cable with a socket wrench.
Start the van to ensure the alternator is charging the battery. Allow the van to idle for five minutes. Turn the van off and allow it to sit for an hour. Attempt to start the van to ensure the battery is holding a charge.
Take the old alternator back to the auto parts store for a return on the "core" deposit. The "core" deposit is the amount charged to the cost of the new alternator and will be returned once they receive the old part.
Always use extreme caution when working around electrical components. Disconnect the battery.