2000 chevy s10 bad thermostat

Question edited for clarity.
Question moved to model category.

Yes there are three o2 sensors

Bank 1 in the exhaust manifold
Bank 2 in the exhaust manifold
One after the Catalytic Converter.

Not sure what you mean 'where is the best place to put it'? The scan tool tells you which one needs replacing by a P**** Code, or are you just replacing one for fun?

Answered here on JustAnswer dot com

The o2 sensors are located in the exhaust pipe. The one you are looking for is the post cat sensor. The sensor furthest back in the pipe after the catalytic converter.
Mar 19, 2007

Chevy S10 Oxygen Sensor Location: Q&A Guide - JustAnswer

Here's what it look's like,it's located next to blower motor,remove electrical connector and two screws and ala,it's off.

The thermostat housing is located on top and front of the engine. You will see a large radiator housing coming from it. There are 4 bolts to open the housing (15mm) and hose clamp(s) to loosen on the radiator hose. Once removed just pull out the 2 thermostats. When you are replacing the thermostat(s)-the gasket(s) for the housing are on the attached to the new thermostats- As you probably noticed when pulling out the old ones.

all chevys do that same thing the only thing i can say is put a small temp in the thermostat

http://www.askmehelpdesk.com/cars-trucks/2000-s10-no-heat-147208.html

Look here. 1999 and 2000 are similar.

Your vehicle as an ignition control module located on top of the distributor (under the cap and rotor) I would pull the ICM and take it to NAPA and have it tested if bad replace it (cost about $80). Sounds like a ICM problem or it could be the ignition switch located on the steering coloum which can't be tested but costs $20. Hope this works

Check the ignition and Engine relay switches located under the hood. Sometimes relays go weak with age and even a bump on the road will shut them off. If you can turn the truck on, take it to Autozone or similar store for a free DTC scan code.

my 2000 dodge caravan heat sometime working sometime not working

i would have the heater core checked out as well as the water pump......tell me what happens

If you are certain there is no air in the coolant system, then there is a chance that the blend door motor is not working or the heater control assembly is bad. since you have replaced your own heater core you probably noticed the the doors inside the heater core housing. One of those doors is controlled by the "hot/cold" knob. The motor on that door could bad.