Hello all. My 2002 Tahoe is driving me nuts. It started with the alternator making a squealing noise and then going out. We replaced it and the battery light started coming on periodically. We had the new alternator tested and found it to be faulty so we got another one and replaced the battery as well. The battery light continued to come on occasionally. We then took it to a GMC dealership and had them test it. They can find nothing wrong with it. The battery is charging and the truck is acting fine. On occasion, when idling, the motor will drag as if the air conditioner is on. Just briefly but it is noticeable. I also checked the connector on the alternator and it looks great as well. I am stumped. Any idea's? We have a trip coming up and I'm afraid to go very far with this thing. Thanks in advance.
Brian Tanksley