Question about 2004 Pontiac Grand Am

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04 Grand AM 3.4 V6 Alternator

Car just suddenly stopped while pulling off from stoplight. Did a few jerks and had to pull over. Was told from initial diagnoses, it was the alternator. Replaced alternator and car still will not start. Everything in car turns on but it acts like it wants to turn over but it won't catch. Any suggestions as to what else could possibly be wrong? Tried to jump car as well but with no success.

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  • allmotor03gt May 11, 2010

    how many miles are on the car? and when did you get a tune up and what was replaced?

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  • Pontiac Master
  • 14,036 Answers

Check fuel pump .mine did the same thing the fuel pump went out.

Posted on Apr 06, 2009

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Auto Zone does not test the alternator under full load so the test result could be borderline.
start the car and turn everything on. If the voltage drops lower than 14.2
replace the alternator.
also the battery could be being drained overnight. to check use a test light by removing a battery terminal and connecting light between battery and cable with car off.
if it lights start be removing fuses.
when the light goes off the problem is with this circuit.
lastly if the light stays on take the wires off the alternator.
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Not to disparage Advanced Auto, but you should check it yourself with a voltage meter-when the car is running, voltage should be over 14 volts, measure it at the battery posts AND at the reat post on the alternator-the readings should be within .02 volts of each other. A digital meter only costs $15 (at Advanced) and is a more accurate test than an alternator that has been removed from the car-when you test it out of the car, you are not accounting for poor connections that might be causing your problem in the first place.

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