Just changed alternator out and new battery in a 2001 grand am. The car will not start it is dragging.

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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This will help.
Thanks.

replace the negative terminal

Bad battery or alternator have both tested and replace the bad part also check battery cables both power and ground and power cable from alternator(since sometimes its something cheap and easy like that)

Check your Alternator connection plugs, some of these FORDS like my 1990 F250 for instance used a very light connector which corrodes BADLY and can cause the 1990 FORDS to have an engine fire if it comes under winter charging loads through the bad contact. Most auto parts stores carry a factory upgrade connector for about 7 bucks. A lot of people buy a whole new alternator while they only need clean contacts on the control (REGULATOR) plug-in on top of the Alternator to make the whole system come up to high volts and start three times as good because the computer and battery are now able to control and charge from the Alternator.

Try resetting the alternator, if that doesn't work try changing the battery

If you need further help, I’m available over the phone at https://www.6ya.com/expert/anik_29134a102eb94344

The alternator has a bad diode in the diode bridge in the alternator,this turns the light on,even though the alternator checks good,and is charging correctly,there is a bad diode,this diode ,along with others,changes ac voltage to dc voltage,if not replaced,it will start causing components to go out.

could be a problem with your flywheel or if the starter was just replaced and you started hearing the noise then it could have to be shimmed out from the flywheel. Could be a starter issue.

Who told you the alternator is O.K.? How much voltage is it producing? Take a volt meter , start car & make sure the alternator is charging properly. Attach meter to the posts & see what it reads. All readings over 13.2 to 14.5 O.k. less means new alternator. Also make sure battery cable connections are clean & tight.

Change fuel filter.

who ever tested your alternator was wrong replace the alternator