Not sure if I put this in the right place since the Aztek has a 3.4, but its still a Pontiac.
Anyway, my mom has an '04 Aztek, and its developed a starting issue: when you turn the key you get all accessory power, but nothing will start the actual ignition sequence. As a work-around, a "remote" was placed on the solenoid contact so that the car could be started from under the hood [after the key has been turned].
They've tried using different keys, but that didn't make a difference. The actual ignition cylinder seems to be fine as power goes to the other accessories when the key is turned, and the sequence works - as long as the button is pushed from the remote leading to the solenoid.
Any ideas what may need to be replaced? Anyone else have this issue before?