My grand am won't start and I just replaced the starter it ain't my battery or the connections what else could it be?

CHECK BATTERY GROUND AND CABLE TO STARTER ALSO CHECK STARTER WATER IS BAD ON STARTERS AND GET WET AND SHORT OUT MEASY GOOD LUCK

Can be transmission not fitted properly issue.

Most likely you have a bad connection somewhere. Trace the battery cables and clean/tighten all terminals or try jumping to a different lug. You might also try removing the starter and jumping directly to the starter to verify that it is good.

It likely is the place to start looking. Does the engine crank over but wont start, or nothing from the starter? If nothing, check for power on the small wire at the starter solenoid, when key is held in crank position. If no power, diagnose start wire from ignition switch to the starter solenoid. If power is at the small wire, but no starter action, recheck battery and starter connections, or have the starter tested.
If the starter works, but car won't run, recheck for spark at the sparkplugs. Have the fuel pressure tested-pressure is critical for injectors to work. If you still can't find the problem, your car needs shop time for diagnosis.

ses this causes and fix it. God bless you
Battery Corrosion: Over time your battery connections can become dirty, or corroded. This corrosion breaks the connection your battery has with the rest of the car, and it won't start. Try cleaning your battery posts and try to start the car again.
Bad Igntion Switch: If your battery checks out, but the starter is still silent, it may be a faulty ignition switch. Turn the key to the on position (not all the way to start). If the red warning lights on your dash don't light up (and your battery connections are clean), the ignition switch is bad. If they do light up, turn the key to the start position. The dash warning lights should turn off at this key position (most cars). If you're not sure, turn on the headlights. When you try to start the car, the lights should either dim (a lot) or turn off completely. If they do, your ignition switch should be ok. If not, the switch will need replacement.
Bad Starter Connection: Corrosion can not only keep your battery from connecting, it can affect any electrical component, especially the ones exposed to the elements like the starter. If you have a helper, you can test the connection by holding a circuit tester lead on the wire that engages the starter. This is the smaller of the two wires connected to the starter. Be sure no part of your body is near the moving parts of the engine - it could still start at any time! Have a friend turn the key and check the current. If you're getting current to the starter but it ain't spinning, it needs replacement.

Could be a failing starter or problems with the cables.
A dead cell in the battery will do it too.

when you state it wouldn't crank, do you mean the starter won't engage or that it just spins over and doesn't start? if no gauges or no starter engagement, then check the battery, battery connections,and the starter for excessive amperage draw. if the starter spins and the engine won't start, then check crankshaft position sensor first. the crank sensor is a more common failure than the distributor or any of the other things you mentioned.

how have you checked out the starter.the one click sounds like it could be a bad starter solenoid problem,or a bad/dirty connection in the circuit.

Hi,
REmove battery cables and clean off all signs of corrosion. Re-install making sure you have tight connections. If still no starter crank, could be a bad starter, check voltage at starter large red wire post to ground on engine block. Should be same as battery voltage. If not , take starter out and to parts store will they will test it free, replace if nessesary.....Mike

Check starter relays. Should be under the hood on the d/s fender well. You will need a helper. if its not working and you don't know how to check the wiring to it get back to me