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it depends on the vehicle but usually 5 minutes to 15 i have personally changed several myself and im not a mechanic by trade. Most have 2 bolts and a tension bolt for the belt

some cars require the radiator and the a/c condenser to be taken out just to see the alternator (2000) cadi deville book time is 3 hrs plus a a/c recharge and coolant flush. i wouldn't say 5 or ten minutes all car have a labor guide for all labor related repairs chilton and motor manuals you can go to a public library and get info on disc or books . i repaired autos for 35 years and you would not believe the places they put these things average time is 1 hr. and includes load test and alt output test

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12y ago
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13y ago

It should only take about an hour at the most to change the alternator.

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14y ago

about 30 min to 1 hour .hope it helps

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11y ago

20 minutes or so.

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Q: How long will it take to replace the alternator on Chevy astro?
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