I too have had mine in for the cable and battery replacement. I told the service writer not to mess with my ecm because I had a tuner chip on it and if they tried to install an update they would more than likely mess my ecm up. They agreed not to mess withit but told me they would need to do updates in the future. I told him I would put the stock tune in when they needed to do this. I don't mined being upfront with them on this and feel its what is necessary when you are too lazy to put the factory tune back in. LOL.