Wont start turn the key and nothing example if it is in gear and you turn the key you get no response, i place in neutral and try nothing, i changed the neutral switch with a new one nothing could it be my starter, how could i tell

Check battery for crank power and connection.

Hi,
Try moving the shift lever in and out of gear and back to Park then try it. Have you tried starting the truck with the shifter in Neutral? If it turns over and starts, I would check the Neutral Safety Start Switch and it's connection down under on the side of the transmission? If you are experiencing lights and dashboard indicators coming on when inserting the key in the ignition but zero response from the solenoid on the starter or the starter turning over when turning the key switch to the start position, I would definitely check the Neutral Safety Start Switch. This switch is the one that allows you to start the vehicle by making sure you are in Park or Neutral. It's in a location on the side of the transmission where salt, sand and corrosive road debris can get trapped that eats away at wires and connections.

It sounds like the neutral safety switch is going bad!

Won't start how ? When your the key to the start position what happens ? The engine spins but won't start an run . this a crank no start condition . If nothing happens when you turn the key to start ,this is a no crank no start condition . Need to be clear on this so we know what to have check . If nothing happens when turning the key to start position ,try moving gear selector to neutral - park neutral safety switch . If when you turn the key to start an the engine does spin but doesn't start an run ,check for spark ,fuel pressure . see what's missing .

Agree place in neutral and try to start . Possible bad safety neutral switch

When this happens, move the Gear Selector lever a bit. It has a Neutral Safety switch that may be slightly out of adjustment

Since you have power to your accessories, here are a few more things to consider:
1: Automatic transmission not in park or the neutral safety switch is faulty
2: On manual transmissions clutch pedal not depressed or or clutch start switch failure
3: Broken or loose wires in the starting circuit. Inspect all wires and connectors at the battery, starter solenoid, and ignition switch
4: Starter motor pinion jammed in flywheel ring gear. Manual transmission. place transmission in gear and rock the vehicle to manually turn the engine. Remove starter and inspect pinion and flywheel

Probably the neutral safety switch. With your foot on the brake, try moving through the gears as you hold the key to start.
Do It Yourself Diagnosis and Repair

Try running the gear selector through all the gears then back into park. If the same thing happens then set your emergency brake, place the gear selector in neutral, while pressing on the brake pedal try to start it. If this works you may have to replace the switch that senses when it is in park. Good Luck