So, I have to block the return line? Why did the book not say this? It just says to turn key on, pump should run for 2 seconds, which it does. Then the pressure should hold steady, which mine doesn't do. How would I go about blocking the return line? Do I need a special tool?
Quick question, could the CTS (Coolant Temperature Sender) cause this to happen? Someone suggested I check it.
The engine is a 4.3L Vortec CMFI
Thanks again for the help!
Saturday, January 30th, 2021 AT 8:50 AM