Is the vehicle really over heating would be the first thing to address . If this vehicle was brought to the chevy dealership I work at , hooking up the factory scan tool to see what the PCM - engine computer is seeing for coolant temp . Too see if the cooling fans work , too see what temp info . the PCM is sending to the instrument cluster . I know GM had stepper motor problems in the instrument cluster . The step motor is what makes the temp , fuel , speedo , tach , gauges needles move . Just replaced a cluster in a 2005 chevy cavalier , temp. gauge goes full hot after just starting the vehicle . The cooling fans should kick on at around 223 degress , do the cooling fans come on ? Given the amount of electronics on these vehicles , it maybe best to take it to a qualified repair shop . That knows how to test these systems . Without testing I would only be guessing as to what could be wrong , Unless your prepaired to replace a bunch of parts , because your going to get a lot of different cause's from on here . Testing is the proper way to finding the problem . If you don't have a scan tool to view engine sensor data parameters , temp sensor. At harbor freight they sell a
Non-Contact Infrared Thermometer With Laser Targeting. This will show what the temp is .
Non Contact Infrared Thermometer With Laser Targeting
Overheating Case Study Ford Explorer 4 0 SOHC Part1
SOURCE: 1995 Chrysler Cirrus overheating
Probably not water pump. Engine is notourious for vapour lock.
Cooling system must be blead of air before thermostat will work. Cool bottom rad hose is a dead give away. If you are still watching this forum reply , and I will walk you through the only way I know how to make it work properly. It's actually easy if you do it my way. I have worked on lots of cars , and this engine was the hardest to bleed out. Did one Yesterday , and works perfect.
Testimonial: "I need help on how to bleed the system thanks"
SOURCE: My 2001 chevrolet venture minivan is over heating.
Check the cooling fan, thermostat or radiator. I'd start with the basics and check to make sure cooling fans kick on. If they do, remove the thermostat and recheck. If it still fails and bottom and lower radiator hoses are hot then you have a plugged radiator
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_677dced97ad9bddf
SOURCE: My 2001 chevrolet venture minivan is over heating.
Try this procedure:
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