A battery changes does not need the ECM reprogrammed. The programming is
stored on the chip, much the same way as your PC stores the programs needed to
start itself (this is not the same as the operating system such as Windows XP.)
However, the ECM 'learns' to adjust itself for ware in the system. This leaned
information is lost if the battery goes dead.
There is good news. The 4th generation F-bodies came with its own on-board
electrical storage ability. This allows the ECM to maintain its 'memory' while
the battery is out, such as a change. Along with the radio station. I belive
the duration is 10 to 12 minutes.
Bottom line, a battery change will not change the ECM is done within the 10
If one needs several fiends and a kag of beer for the job. That is OK to.
Just start her up the next day once your head clears and drive normally. The
ECM will relearn.
OK, want more. Most auto parts store sell a jumper device the plugs into the
dashboard ligher and uses a 9 volt battery to maintain the ECM and radio while
the battery is out. The duration is several hours as the voltage and Amps are
Have at it!