first off, hi everyone. i have an 04 tahoe lt with 89000 miles on it. over the past few months i have been having to put a lot of coolant in. i have no signs of leaks anywhere. i spoke to a mechanic friend with a suburban and he said that his truck did the same thing and ended up being a recall in which the engine was replaced by the dealership for free. has anyone else heard of this and if so know how to go about it? thanks for the help.