2011 Sierra SLE

mattvlmarshall

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I have a 2011 Sierra SLE and it has the dual climate control and i was wondering if anyone with this feature, if it takes the heater to actually warm up. It literally takes 20 min of driving on the freeway for it to finally start to warm up. does anyone have this problem?
 
if you have the fan on high speed from the beginning it will not warm up, have the on a low speed for awhile, it is the same thing for the ac if you have the fan on high at the beginning it will not get cold try it one time have the fan on low and see if it get warm faster
now if you turn the defroster on in the climate control it turns the ac compressor on and it will help warn it up faster the ac compressor helps remove moister from the air somehow but I aint sure
 
I will have to try it Tuesday. I was reading in the manual it needs about 20 min to warm up. If the truck had a engine coolant heater on it where should I look for the plug? I've heard under the passenger side battery, on the driver side on the frame and... By the engine fuse box... What would the plug look like?
 
I will have to try it Tuesday. I was reading in the manual it needs about 20 min to warm up. If the truck had a engine coolant heater on it where should I look for the plug? I've heard under the passenger side battery, on the driver side on the frame and... By the engine fuse box... What would the plug look like?

Have someone check the engine thermostat it sounds like its stuck open

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98 truck, no it did not really help the problem. I'm trying to find out if the truck has a block heater cable that I just can't see, but I figure if it had one it should be to hard to find. It sucks because right now the mornings are 15 degrees out side.
 
Had a 2012 SLE. It would blow warmer air by the second or third mile, depending on the outside temp.

Easy to determine if its radiator or heater. What does the temperature gauge read after about five minutes? It should be at normal operating temperature that soon. If so, problem is not the engine heating up but rather the heater function.

If the engine does not heat up, the thermostat is likely stuck open and needs replacing.
 
The engine temp after running for about 5 min it only goes up about 10 degrees but after driving it for a while it warms up faster obviously. It was 16 degrees this morning and in the 4 mile drive to work the engine temp only went up 9 degrees and I only ran it like 2 min be fore I drove the truck to work and was still blowing cold air. I donno what the deal is.
 
I suspect the thermostat, then. It is supposed to restrict the flow of water through the radiator until engine temp comes up. I would also suspect the fuel mixture is running rich for a longer period, too, affecting your fuel mileage some. Kinda like the choke on a carbureted engine would.
 
The engine temp after running for about 5 min it only goes up about 10 degrees but after driving it for a while it warms up faster obviously. It was 16 degrees this morning and in the 4 mile drive to work the engine temp only went up 9 degrees and I only ran it like 2 min be fore I drove the truck to work and was still blowing cold air. I donno what the deal is.

Hello mattvlmarshall,

I am sorry to hear that you are experiencing a concern with your Sierra warming up. Have you brought your vehicle into your local GMC dealership in regard to this concern yet? I would be more than happy to assist you in setting up an appointment and working with the dealership if you would like. If you would like any assistance, please feel free to private message me and we can further discuss this concern.

Gregory W.
GMC Customer Care
 


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