Question about 2003 Cadillac CTS

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2003 cts will not start - 101,000 miles

Started my 2003 cts last night and for the first time I heard a rattling noise coming from under the hood - freaked me out because it was pretty loud. I drove the car home and on the drive home the noise stopped. When back out about 2 hrs later and the car would not start. It turns over - but it will not start. I have 101,000 miles on it. What could be the problem. I also have an extended warranty too.

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It sounds like your alternator let go, therefore your battery is not charging, you will need to investigate further but the rattling would be explained by the alternator mechanically breaking internally and failing to charge the battery resulting in your present situation

Posted on Mar 18, 2009

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3) If all is good, check engine and transmission mounts. Make certain none have collapsed, cracked or broken.
4) If all good, remove all accessory drive belts and start engine to see if noise goes away.
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