My 2006 Denali XL is suffering from what appears to be a common problem with the 6.0L motor - leaking water pump. Stealer wants $550 - $600 to replace. Looks like the pump is about $100. I've replaced many a water pump back in the day on small block chevys but never on these newer motors. Any reason not to tackle this repair myself? For those familiar with these motors, is there anything I need to be aware of during the swap (thread sealant, anti-seize, loc-tite, torque settings, etc.)? Thanks.