Hi! What is the labor cost of Alternator on 1999 Cadillac DeVille

How much will it cost to fix an alternator in a Cadillac Deville? Or Average cost. Battery is Good, dashboard just started to messge: "Battery not recharging"

3 answers 1 comment
How do you know the battery is good? To replace alt is about $300 plus.
Thanks! It's a Brand new battery- Installed in October. When it was having problems at that time, was the Alternator keeping the bad battery alive! Also hearing a lot of rattling sounds prior.
At at dealer, the cost is approximately $400
approx 350.00 plus alt alt's run from 275.00 to 700.00 depending on rebuilder