[GTP Dad]

I suspect two issues. First the ignition switch appears to be going bad. Given the fact that you must turn the key more than once indicates that there may be an issue in the contacts at the switch. This could also be the issue with the blower. Since the power comes from the ignition switch it may be making intermittent contact and causing the issue. The first thing to do would be to change the blower motor resistor. That will eliminate that as a suspected cause.

Finally the SEL light on the Grand Am is not a trouble light it indicates a need for service on some issue like an oil change or air filter change it does not have anything to do with the PCM and those trouble codes. The Check Engine light is the one that indicated trouble with engine or emissions components.