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Re: 2005 Classic possible ignition switch problem
About 10 years ago (May of '13) I worked on an '05 Malibu Classic with similar symptoms - I keep notes. Here is what I had in the record:
"Replaced ignition switch; Re-installed original PCM; Removed IP and re-seated switch connector; Taped wire harnesses repairing failed cloth; Re-learned Passkey to BCM/PCM."
It was exhibiting a crank with no injector pulses (theft mode). Someone else had replaced the PCM thinking it was at fault. I handed that back to the owner suggesting he get a refund. The sensing ring on the switch was not reliably sending a signal to the PCM, possibly due to wiring and connection issues, possibly due to weak magnets/coils in the switch. That problem never occurred again.
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