Guys I'm new to the Tahoe world. I come from a diesel background and 150k miles is just warming up. There is an 07 LT for sale near me with 150k miles on it. The guy has lowered his price 3 times already and is down to $12k on the price. He claims it is all highway miles. I just don't want to buy it and replace a motor a few months later. Any feed back would be appreciated.