You may not care but the loss of all the learned values means each time that is done the fuel trims, misfire, knock, smog, sensor tests, timing, idle setting, everything the PCM took time to learn/adapt and adjust for are gone and now the engine can be running too learn more timing pulled to larger knock counts, etc
Same if auto trannie and the TCM then has to learn drive style, shift points, etc
Depending on drive style and use it can take several cold drive cycles for the relearns to be redone and then voltage yanked again and car controllers are more in relearn state then best performance state
Yes in worst case GM says you can do it but not as a normal process and why GM sells a battery tender to be used and not pulling constant voltage source
and of course with no voltage now security and VATs are also dead just making it easy for thief
Not concerned about temp settings,,,,I have disconnected my batt at least 20 times on the c7... Sometimes for days.....
And why does the manual tell you how to do it on page 10-30.....??????
For vehicles without a battery maintainer, see the following information:
Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from