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on the trailblazers- when the battery is disconnected for more than 30 min....
and you have a dirty throttle body-... the engine runs fine...
but when you turn on the AC- the idle goes up and down AC comes on and off. and sometimes the engine shuts off.........
the fix is to clean the throttle body and disconnect the battery.....
So- some learned settings are lost.......... and eventually relearned.....
But after a prolonged battery disconnect... I can feel my transmission shift differently....
it then appears to relearn my driving style- (shift points).
so it may very well be possible on your car....
I dont know how similar the throttle body on your car is to the TB.... but just letting you know in case your Tthrottle body is dirty....
 
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