No you don't need a new alternator. Alternator is only needed once the engine is running.
Have you been trying to crank, and crank,and crank,and crank,and crank, and crank with the new battery? If you have, it possibly just out of juice and need to be recharged.
The minute a vehicle does not start, always start with the two main things that make an engine ticks: Do you have fuel? Do you have spark?
Perform this diagnostic.
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Friday, February 27th, 2009 AT 1:42 AM