Have 2001 Pontiac Montana that will not start! I have been though everything! starter tested bad have new one! I am at ignition switch but am wondering if it could be neutral safety car will not start in neutral

If everything else is working, most probable cause is a faulty ignition switch, or a starter relay (if the vehicle has one).

Do you know how to test automotive electrical circuits ? Do you know what a electrical wiring diagram is. Have a DVOM - digital volt ohm meter ? How about a automotive relay , do you know what it is an how it works ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model ,engine . Under system click on engine , then under subsystem click on starting. Click the search button ,then the blue link . You will see all the componets involved in starting the vehicle. ignition switch , starter range switch , starter relay , PCM -powertrain control module . When you turn the ignition switch to the start position it sends a voltage signal to the PCM , this tells the PCM start is requested , in turn the PCM energize's the starter relay . This will close contacts inside the relay allowing B+ voltage at pin 30 of the relay to go to the starter solenoid . engaging the starter . Checking fuse's an power an ground , testing relay control . . Videos on youtube for electrical testing.
Electric Testing Techniques You Need to Know
Relays Understanding Diagnosis and Testing Relayed Circuits Pt1

bad neutral safety switch Here's the part. http://www.autozone.com/batteries-starting-and-charging/neutral-safety-switch/duralast-neutral-safety-switch/pontiac/montana-2wd/2005/6-cylinders-e-3-4l-sfi/476559_0_0

The last ignition switch I worked on was on a 1996 Pontiac sun fire. It was located on the left side of the steering column across from the key tumbler under the plastic. I found the start wires and jumpered them making the starter turn. Next I removed the switch from the column, and with a screwdriver, I turned it until the starter once again turned. I found the tumbler assembly wasn't turning far enough to start it. There was a small metal cover on the tumbler that had popped up and kept it from going farther. Hope this helps. There are some useful videos on YouTube that may help also.

Turn on headlamps and try to start. Do lights dim? Yes= bad battery connections, low charge on battery, bad solenoid, bad starter. Not dimming? bad solenoid, bad starter switch, bad neutral safety switch, bad starter relay, bad ignition switch. Use voltmeter to see if ignition switch works, and so on.

sound like ignition switch going bad or have loose wire to ignition switch.

Sounds like the security system activated or the ignition is bad. If you have an alarm installed remove it. If you don't then replace the ignition switch after checking all fuses in the fuse panel. There is one that can blow and will give you this symptom.

I've seen that once before on a Montana, it turned out to be one of the fuseable links coming off of the starter.

could be starter,,,some times you can tap on the bottom of the starter,,then try to start it,,,but i would look there,,,

Continue tracing back to the ignition/starter switch and associated fuses.