Kevin's 2004 CTS· Registered
Discussion Starter · #1 ·
I have a 1st gen 2004 CTS 3.6 ltr. My water pump recently failed. Today I replaced the water pump with a brand new one. I also replaced all lost coolant with Dex Cool antifreeze. After doing all this I started the car and turned the heat up to the highest level. Upon reaching normal operating temp I noticed it was blowing cold air. I double checked the coolant level which is fine. I than test drove it and noticed the temperature starting to rise, still no hot air coming from heater. I checked the water pump pulley and all is fine with that. I am at a loss. Brand new water pump and coolant level normal but the car over heats with no hot air blowing through heater. Can anyone please offer a suggestion as to what the problem might be? I am at a loss.