Need to change thermostat in 01' Chevy Astro Van

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Question moved to model category.

Newbie!! G20 radiator replacement - Chevy Message Forum

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Mar 10, 2015 - Resist the temptation to add anything to the radiator. Working on a van is challenging enough without having nuisances like this. Be patient as ...

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otad doesn't help ---did the trans come out of an 05 astro van s-10 blazer /jimmy s-15 or safari and it your awd because you need to match the rwd with an rwd and a awd with an awd /4wd from above and the unit has to be compatible with the 05

first, find out where that water went....
Fill the system and pop on a new cap, try again.
Look for any sign of water on the spark plugs. (pull them out and look at them)

Could be that you need to add a lil more fluid to it.

Change the thermostat and start from there.

If you radiator is full ,as in you have no leaks, it is most likely going to be a water pump issue. Unless you have a serious clog in the system, but chances are its the water pump, not an uncommon thing to go wrong

I am thinking the thermostat is stuck closed. Take of the top radiator hose and take off housing and put the thermostat in a pot and heat up to boiling temperature and see if it opens. If it doesn't replace it. This happens when a car is not used for a long time.

coolant temperature sensor is located next to thermostat housing at front of engine in intake manifold you will see it right next to top radiator hose but this one reports to pcm the one for the gauge in dash or light is on the drivers side cylinder head you will see one little wire going to a sensor screwed in head near second plug back on drivers side

there is no relay power from control panel through pressure switchs to compressor

Check coolant level, and possibly replace thermostat. When a thermostat gets stuck in the closed position, coolant does not circulate thru motor. Gauge stays midrange when driving, because motor is being cooled by air and or the fan. If car seems to operate completely normal, then the gauge is faulty.