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  1. #1

    Default alternator 03 trailblazer

    how do you change the alternator on an 03 chevy trailblazer? how many bolts are there?

  2. #2


    It's a pretty easy job to get done, it's actually a pretty straight-forward project and will take a typical person between 40 minutes and 90 minutes or so.

    1. Battery first. It's a good idea to take the battery connection off, just in case.
    2. Serpentine Belt. The hardest part is to get the serpentine belt loose, you must know that you have to get the tension off of the belt and slip it off. This is very easy to do and should take like 30 seconds, but if you've never done it before you might over-think it and spend an hour or more working on this.
    3. Three bolts to freedom. There are three bolts that hold on the alternator. Two on top and one on the bottom. Take these out and save them as the new alternator probably will not have bolts with it.
    4. Unhook the alternator. Take care to unplug everything carefully and not how they fit into the unit.
    5. Swap them out! Pretty self-explanitory.
    6. Put the new alternator in. Set it in, put the bolts in and hook up the electrical connectors.
    7. Battery last. Hook the battery back up and fire it up and see if you're generating electricity.

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