hmmm, sorry to dig up an old thread, but this is the first time i've heard of another 07 with a screwed pump.
when i did my oil change around 60 000 i noticed my overflow empty, and the rad took a bit of coolant to top off too. i didn't see any leaks so i didn't think much of it. just the other day i did my oil change at 68 000, and again the reservoir had dropped. when it was up on the hoist i spotted the stains underneath the water pump : / .... i didn't pressure test the thing as i didn't want to risk blowing it even more.
68 000 kms and this will be its first repair though, so no huge worries. but still, it seems early for a WP to go. $70 for the part and a bit more for the coolant, so all in all it'll only cost me an hour of my time and about a hundred bucks. not too bad i guess.
2003 GMC Sierra 3500 -- dually, 4x4, hasn't blown up yet and that's what i look for in a truck
Ford Doctor -- They come in broken and leave fixed. Ford of Canada Master Tech