I've got an '07 LBZ. Only had it maybe a month or so now and got into it this morning and after starting noticed that the volt meter on the dash showed 12 volts. After 30 seconds or so it slowly rocked itself up to 14-14.2 volts. Drove to work, let it sit most of the day and took a volt meter out to check the battery. Battery shows 12.8 volts. Start up... battery shows 12.2 volts. After 30 seconds or so voltage at the battery slowly climbs to 14.2 volts. Sounds to me that the voltage regulator is flaking out but.... In this day and age of computer controls I didn't know if there is some sort of slow start up program installed. Otherwise it's of to the parts store. Thanks for the help.