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Discussion Starter · #1 ·
Just got a used 2012 Impala from a dealership. Doesn't accelerate as smoothly or quietly as my 2002 Buick LeSabre. Want to re-set the ECM so it can learn my driving style.


Unhooked the battery cables today and connected them together while cleaning the corrosion off the terminals and clamps. They were unhooked for over 20min. When I connected them back up the only thing that was reset was the clock and fuel range gauge.


I expected the radio, trip odometer and setable settings to be changed but weren't. Should they have been? I do notice the trans shifts differently and the acceleration is also different.


Thanks!!
 

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Discussion Starter · #4 ·
Could have just pulled the ECM fuse for 3min
There isn't an ECM fuse. There's 3 "ECM IGN" - Electronic Control Module-Ignition, "ECM/TCM" - Transmission Control Module & "ETC/ECM" - Electronic Throttle Control.

Which one and what's the procedure for doing it?


Should I have lost more than the clock & fuel range?

Thanks
 
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