I bought an '05 Tahoe last month. Dealer told me the factory warranty ran out 4/29/08. He said to give him a call before it ran out so I could price what an extended warranty would cost. I thought the old rule of thumb was not to buy an extended warranty as they are usually not worth it. Here is my question, does GM offer an extended warranty that is identical or close to factory? Any thoughts on how much it costs? Any other experiences or comments are welcome.