Buzzard Posted July 12, 2016 Report Share Posted July 12, 2016 Hey guys,i have tried searching but I am having some trouble finding the exact water pump for my 03' SS. looks like they have a couple different versions that have different thermostat housing setups? I need to know what the part number for the pump & thermo is for the 03' and if i will need any additional seals/gaskets that are not included with the pump. My PS pump just started growling too so figured i would change that at the same time and would also like to know the part number for that w/ reservoir if anyone has it? Thanks in advance for the help! Quote Link to comment Share on other sites More sharing options...
Buzzard Posted July 12, 2016 Author Report Share Posted July 12, 2016 also, does the oem acdelco water pump have a plastic or metal impellar? is there a brand that someone would suggest if not that one? i never skimp out on water pumps so just want to make sure i get the best one i can get Quote Link to comment Share on other sites More sharing options...
EXGM Posted July 20, 2016 Report Share Posted July 20, 2016 (edited) GM for some reason changed the water pump housing several years ago. If you go with a new GM pump you have to buy the updated t-stat housing. Edited July 20, 2016 by EXGM (see edit history) Quote Link to comment Share on other sites More sharing options...
DrLove38 Posted July 24, 2016 Report Share Posted July 24, 2016 You probably found it but the water pump # is ACDELCO-251-743, thermostat # is ACDELCO-1511057. I also did the whole hose and belt thing along with the pump. Quote Link to comment Share on other sites More sharing options...
fox_forma Posted January 14, 2018 Report Share Posted January 14, 2018 Reviving an old thread, what is the New 160 thermostat PN to fit this pump as I just replaced my WP with the 251-743 and can't find the cross ref 160 stat Quote Link to comment Share on other sites More sharing options...
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