I have been enjoying my GMC envoy XL 2003 since 2006, I have never been to a mechanic except to change brakes and oil. I am almost about to hit the 100k miles. Last weekend I went and changed my oil and all of a sudden. there is problems after problems. I have been hearing some noise when I start engine and when driving the gas seems hard or stall. I thought maybe it was the transmission oil so this morning I went and spent $175 to flush and change the transmission fluid. Whiles I was there, they told me my radiator ventilator is loose. So I went to a mechanic to take a look at it and he told me, I need a new water pump. My engine is not warming or heating. I could see the ventilator loose but it seems it is tight. so my question is what has ventilator got to do with water pump.
