Which water pump

[BrainDead]

gonna throw in a new water pump with the radiator for "gp" but can't tell the difference between the two.

1. ACDelco #252901
2. ACDelco #251713

They look the same to me, the 2nd one has mounting hardware and a thermostat. I already have a thermostat and the mounting bolts, but what else am I missing between the 2?

 

[Doubeleive]

Post up the last 8 of your vin and @915_Tahoe can verify which one you need

 

[Fless]

The more expensive one is original equipment.

The other is the AC Delco Professional grade. Not the super cheap line, but in the middle, quality-wise.

 

[BrainDead]

Post up the last 8 of your vin and @915_Tahoe can verify which one you need

Last 8 of the vin are 7R328741

 

[BrainDead]

The more expensive one is original equipment.

The other is the AC Delco Professional grade. Not the super cheap line, but in the middle, quality-wise.

You would think the professional line would be top of the line

 

[Doubeleive]

you can also check here with your complete vin number
https://parts-catalog.acdelco.com/catalog/catalog_search.php

 

[BrainDead]

you can also check here with your complete vin number
https://parts-catalog.acdelco.com/catalog/catalog_search.php

Found it, thanks Doubeleive!

 

[OR VietVet]

I see this post got switched from the 2000-2006 section. Great. Naming it "professional grade" would seem better than OE but alas, it is not. Good quality but not the better of the two. Think of it this way, your oe one lasted a long time and to reorder the same would get you like results. Always do the new thermostyat and I also like to recommend a new reservoir cap at the same time. https://www.rockauto.com/en/moreinfo.php?pk=4646841&cc=1433259&jsn=3371

New belts as well?

 

[HiHoeSilver]

You would think the professional line would be top of the line

Delco has 3 lines.
OE, Professional, Advantage. In that order. There is a Specialty line, but it doesn't really fall in the quality "spectrum."