Trouble Starting

[AleroDrime]

Ok, you sit in your Alero and get ready to start it. It was running maybe 15 minutes ago and fine all day. As you turn the key all you hear is the engine turning very quickly buy it won't turn over. Sometimes it will start while doing this and cut right off. What do you think is wrong?

Sorry to post like this guys. My cars been doing this on and off. Like 9 times out of 10 it starts just fine. I'm pretty certain its not passlock, no security lights are on and it is doing everything else(unlike an passlock youtube video I've watched).

Most the time I do hear the fuel pump cut on. Some things that seem to help is turning the key back and forth about 5 times and stomping the pedal while turning the key. Sometimes it remedy's it after a couple trys. Some times i check the battery its at 11.9 volts so i say eff it put the charger on and the car starts later.

The only thing that sounds remotely similar to passlock to me is after waiting it sometimes starts up for me. But I'm hearing the starter fire rapidly when i turn the key.

Ive taken the car to a shop, after a 150 dollars they claimed to have fixed my car. Truth is from what i can tell they didnt do jackshit, they tried the 8 times it started good and when i got it back it wouldn't start. Now ive taken the car back, it was there over Christmas, and he's claiming its the passlock sensor and the whole unit needs to be replaced. 170 for the part. Im thinking that's total bullshit too because i haven't seen the security light on once and the starter seems to be working.