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Coolant leak came back after replacing water pump

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Hi all,


About 4-5 months ago, I bought a 2002 Yukon XL, and it was leaking coolant a day later, so I took it to my dad's repair guy, and he replaced the water pump. about 5,000 miles later, i got a low coolant light when I was running the AC in town, so I topped it off, and it didn't come on for a while. This past weekend I went camping about 4 hours away, and when I started coming back, the radiator started making a grinding noise, like the fan was getting caught up or something, and the coolant light came back on. It smelt like coolant under the hood. I can't tell where its coming from. I refilled it, and that got me home without any low coolant messages, but the radiator still made that sound. Thoughts? Should I call that mechanic again? He's about an hours drive away, and I don't really want to drive it that far if I don't have to. It's not leaking like it did when I replaced the water pump, it just poured out back then, now it still holds most of it.

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