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Posted on Jan 02, 2017
Hello. I used to work in a GM dealer. It is seldom the EGR valve that is the problem. If it is code P1404, the problem is a PCM calibration. Take it to a local dealer and they can reflash the PCM. If you want to get technical about it, the PCM is and emission control device and should be covered by warranty for 8 years or 80,000 miles.
Posted on Apr 16, 2009
SOURCE: overheating 2001 pontiac aztek
remove coolant.remove thermostat remove bottom radiator hose to water pump.put a empty container under the radiator.take a water hose put it where thermostat goes flush out the rust in block.watch the water as it come out the water pump .if stream water is small keep flushing until you get a study sream of clear water. also flush out radiator. lower water pressure dont flush radiator it with high water pressure you could burst it. make clean the over flow jug .make sure it not stopped up.put in a new thermostat and radiator pressure cap. fill radiator with half antifreeze and half water.bleed the coolant system.
Posted on Apr 20, 2009
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