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I'm talking about the smaller OHV engine. If you have the big engine, my remarks might not be relevant.

It's sort of a pain. You have to remove the serpentine belt to get the alternator off. Look for a routing diagram of the belt on the underside of your hood, or somewhere in the engine compartment. You absolutely need to know how it routes. If you don't have a diagram, make your own.

The belt is removed by relieving the tension on the tensioner. On my '96, it's located down and rearward from the alternator. It rotates forward to slack the belt.

The alternator has 3 bolts. Two are visible from the passenger side of the alternator. One is danged long! There is also one that's hidden on the driver's side, under sort of a bracket. You might have to feel for it. You sure as heck can't see it!

there are a couple of electrical connectors to unplug too. Take care with these. OH YEAH! Disconnect the battery before you start!

Once you have the old alt. off, the new goes on more or less the same way. The pain can be getting the belt back on. Get someone to help you. It's difficult to keep the belts on all the pulleys, as well as rotating the tensioner. While you have the belt off, check it for frays and cracks. If there are any, now is the time to replace it.

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Q: How do you replace the alternator on a 2003 Pontiac Sunfire?
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