new water pump for 2000 tahoe...

[bass_caster]

the water pump is leaking and in need of replacement on my 2000 tahoe nbs 5.3l 4x4

my question is, should i get a new GM pump or an aftermarket pump. i've seen posts in here that its common for them to leak from the weep hole (which is the case for my leak). i dont know if this is common for all of them no matter the maker, or if its specific to the GM pumps. i did some pricing on aftermarket pumps and found some aftermarket pumps with lifetime warranties for less money than the GM with a shorter warranty. i know "lifetime warranty" doesnt mean it will last forever, but sometimes i have more confidence in a part that has "lifetime" and the same part with a 1 year warranty. if for no other reason, atleast i'll be able to get a replacement at no cost more than a year later.

also, do the water pumps come with all the parts needed to complete the job, or do i also need to buy an additional gasket/seal kit.

this will also be my first time changing the pump (on this vehicle, but i've done other non-tahoe vehicles in the past). any helpful hints for completing the job?

[MT-2500]

Always go brand new not rebuilt.
Should have all gaskets to replace it but you need to check your hoses and belts and coolant when replacing it.

I have had good luck with the aftermarket brand new water pumps.

[roadrunner2]

I recently had mine replaced and the pump (GM) price was $275 (CDN).