Right behind the grill around the rad. support on the passenger side (usually) there is a sensor called an ambient temperature sensor. That gives your outside temp. on your rearview mirror.
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Does the compass work when the temperature goes out? If the compass still works then chances are that the ambient temp sensor is defective. Also, could be wiring to the sensor. If the compass goes out with the temperature then chances are the mirror itself is defective. Cheapest most common problem is the ambient temp sensor. It's behind the grill by the condenser at the front of the vehicle.
That could be your problem. The computer sees the temperature is low and reconfigures your fuel mixture accordingly. Replace the thermostat with a new GM unit. They are way better than the aftermarket stuff.
Trucks runs most efficient around 200 degrees.. Check air pressure in your tires air filter and you might try some fuel additive as well. Good luck!
it could be a tune up issue such as plug wires plugs . but my guess is its a computer engine temp sensor if it reads 5 degrees out of range it cuold give you a hard start or a no start problems the best way to look at this problem is with a scan tool when it is cold to see if the temp matches outside ambeint air temp 1 or 2 degrees ok b ut not 4 to five there is a nother way to check it buy useing dvom at a temp to omhs chart.
Either the system is low on refrigerant , the electric fan is not working or the orifice tube is plugged. More than likely the system is low on refrigerant , have it evacuated and recharged.
Check the connector that plugs into the back of the mirror and make sure it is pushed in all the way. If that is not it, look carefully at the wires going into the connector. I had one that broke off. I had to pull the pin out of the connector and re crimp it onto the wire.
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I have a 2003 chevy 2500HD extended cab that the right side window, seat heater, seat controls, door lock, will not work. all other windows and door locks work. I checked all fuses and they are good. what can it be.
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