I am purchasing an 08 Tahoe Hybrid. The battery is under warranty and part of the deal is that they will replace the battery, but to do that the service center has to find that the battery needs to be replaced, which I believe it does. I believe that it is not holding a full charge. I don't believe they are putting any work into this. I tailed the vehicle this morning and they took it for a test drive and parked it. Does anyone have access to the service manual or know how to test the battery (either me or the service shop) so I can go to them with info and tell them exactly how to demonstrate the batteries diminished capacity?

Thanks

JT