Water Pump Question - GMT800

[jBlaze3000]

Got a leaky water pump on my 2000 Suburban 1500 LT. Looking at the replacements on Rock Auto I see there are 2 different versions - one for a 1.88" thermostat outlet and one for a 2.05" thermostat outlet.

 

Wondering if there is a way to tell which pump I have with taking the thermostat off and measuring. Vehicle options, VIN #, hose size? I'm assuming worst case scenario is if I buy the wrong one I just need a new thermostat?

 

I know someone on here has been through this before. Thanks in advance.

 

 

[Mckenzie]

 

 

http://www.1aauto.com/1A/WaterPumps/Chevy/Suburban/1AEWP00021/429565/2000

 

This might help yah

[jBlaze3000]

Just checked my VIN number and it matches the one in your link so I have the 2.05" outlet. Think I'm good to go. Thanks!

[Mckenzie]

Happy to help

[PJB1972]

In the video... He DOESN'T "apply a thin layer of RTV on both sides of the gasket" as directed in my Haynes manual.

Who's correct?

 

To RTV or not to RTV? THAT is the question...

[bossier62guy]

For what it's worth, the GM service manual makes no mention of using RTV either...

[txab]

Not

[Jason B]

 

 

http://www.1aauto.com/1A/WaterPumps/Chevy/Suburban/1AEWP00021/429565/2000

 

This might help yah

Need some help.

 

2003 Sierra 1500, 5.3L.

 

VIN: 1GCEK19T13E330126

 

How do I know what size I have? 2.02" Diameter thermostat Outlet or 1.88" Diameter? And it's the original water pump I'm replacing. Someone else told me I must replace thermostat regardless, I hope that's not true? It's fine.

[Jason B]

Anyone?