A Story from long ago...water pumps...

[A26B]

I did a little research on this matter of the 2 part numbers, 252-703 and 251-561. Appears it is an old subject of confusion. Here's what I found, (below)with a letter from AC Delco detailing the difference.

Summary of my research is as follows;

"old" Delco #251-561 is phased out by "new" Delco #252-703. Same pump, different supplier to Delco.

GM #10159599 is Delco unit with casting #10135833. It has also appeared with GM #10135875 on Delco box label, same casting number, brand new, no gasket.

Bottom line: no difference in pumps, all of the above are brand new units made by/for Delco for the LT5 only. No remans by Delco or GM.

FWIW, GM discontinued the #10159599 water pump 3/07. There are 3 left in dealership inventory around the country and the price quoted to me was $600 & some change.

From: Bruce L. Wolfe <blwzr1@sprynet.com>
To: ACDelco Customer Assistance Center
Subject: Re: ACDelco - Product Suggestions

<snip>

I saw a "Pump Kit" (# 252-703) also listed on the AC Delco web-site. Is that
particular kit a *rebuild kit* for the water pump (# 251-561)? What does that
particular kit (# 252-703) contain?

Thank you,
bruce

----- Original Message -----
From: "ACDelco Customer Assistance Center"
To: "Bruce L. Wolfe" <blwzr1@sprynet.com>
Sent: Thursday, November 15, 2001 6:41 AM
Subject: ACDelco Pump Kit

Thanks for taking the time to write ACDelco.

In regards to your inquiry, according to our Product Specialists, the part
number 252-703 is the latest part number. The pump kit was resourced
to another supplier. The pump is new w/gasket and not a reman kit.

The 251-561 number is being phased out and will be cataloged until PDC
supplies are depleted. As far as fit and function the two part numbers are
identical only the names have been changed to protect the innocent.

Thank you for your interest in ACDelco.

ACDelco Customer Assistance