Yeah, I looked it up. It's a code saying there's an error in the memory of the control module and seems to pop up with a lot of things.
It looks to be the ECM version of "I have no idea what's going on" and doesn't help much with diagnosis unless another code comes up with it.

Not sure if the ECM knows individual power switches, but we did flip flop them in the doors at one point to see if the actuators were affected at all.

 

It's doing it again... Did the same thing, day after I put the new switches in. Had AutoZone check and clear the code (still just p0601) and then it did it again this morning.

Starting to think it's only on reeeeally cold days. Taking it to Pep Boys for diagnosis tomorrow along with a list of potential things that could be causing it (besides the ECM being bad).

Anybody have some recommendations on where to get a new ECM if that's what I end up needing? I usually order parts from gmpartsdirect but not sure if that'll be cheapest for this.
Thanks!

 

If I buy a used but functional ECM off of Ebay for $60 instead of a new one for $400, am I shooting myself in the foot? >.>
I did get the part number verified (12599714 Engine control module) so it should be easy to find one.

So long as the dealer will tune/flash a used one for me, need to ask them about that.