I have an 03 silverado 4.3 v6, that has what I believe is a leaking intake manifold gasket. The truck leaks about a dime size puddle of coolant on the ground in the winter. The belt squeels too this time of year and you can constantly smell coolant. For some reason its not noticible during the summer. My question is how tough is changing the gaskests out? I really don't want to take the truck in and pay the money if its all just labor intensive. I guess I need to start doing my reasearch. Any tips would be appreciated.