Water Pump Parts?

[silverad03]

Looking to replace the water pump and thermostat on my 2003 Silverado 1500 (5.3L) but having some difficulty finding exactly what I need. It looks like I need a 251-743 (AC Delco) water pump kit but what I cannot figure out is what items, exactly, this so-called "kit" includes. I started looking for a 251-714 water pump kit but found an AC Delco bulletin somewhere that stated AC Delco part number 251-714 was replaced by 2 part numbers: 251-743 "water pump" and 15-7524 "inlet, thermostat, seal". However, the 251-743 is still listed as a kit in the catalogs I am looking at.

 

At the end of the day I need the items below - please help with the part numbers (AC Delco)!:

 

• 
  

Water Pump

Water Pump Gaskets

Thermostat

Thermostat Seal (does the thermostat have its own seal separate from the water neck seal?)?

Water neck Seal

 

Thanks!

[K1500Tech]

Usually the a/c delco pump comes as a complete unit.

[silverad03]

Usually the a/c delco pump comes as a complete unit.

 

Ok so I am slow here. What do you mean by "complete unit"?

 

It sounds like you are saying the 251-743 water pump kit contains all of the items I am asking about (water pump, pump gaskets, thermostat, water neck gasket, thermostat seal) as a kit on that one part number - right?

[rdnkcpa]

Usually the a/c delco pump comes as a complete unit.

 

Ok so I am slow here. What do you mean by "complete unit"?

 

It sounds like you are saying the 251-743 water pump kit contains all of the items I am asking about (water pump, pump gaskets, thermostat, water neck gasket, thermostat seal) as a kit on that one part number - right?

 

 

I just bought:

GM part#19256261 & AC-Delco part#251-743

 

It comes with the waterpump and gaskets. You need to purchase the the thermostat and thermostat gasket seperately.

[silverad03]

Exactly the info I was looking for.

 

Thanks rdnkcpa!