While air conditioning in a car is one of the most popular product features during the summer, it can also bring some inconveniences. In truth, the air conditioning in a GMC Sierra can have a bad smell, and on this page we’re going to try to enable you identify why. To accomplish this, first we will examine the reason of this bad smell of air conditioning, then, in a second time, we will try to give you possibilities to make them go away.


Why does the air conditioning of my GMC Sierra have a smell of humidity?

So we start our guideline with the source of the bad smells coming from the air conditioning of your GMC Sierra. If you have the impression that it is a musty smell, humidity, or other, the origin of these smells is often similar. In truth, air conditioning causes a lot of humidity, which will tend to gather in the ventilation system of your GMC Sierra. This humidity is the perfect base of the spreading of bacteria and fungi of all kinds in the air conditioning of your GMC Sierra. Additionally, it is possible that smoking in your vehicle, or not cleaning it often (food remains for example) will contribute to enhance the odors. Finally, the last traditional cause for a bad air conditioning smell in your GMC Sierra is that you have a refrigerant gas leak, called FREON gas, which is toxic and releases a bad smell that will disperse in the passenger compartment of your car.

What can I do to get the bad smell out of my GMC Sierra?

Now that you know where to look to uncover the motive of this smell, we will try to help you to get rid of bad air conditioning odors on your GMC Sierra, because in addition to being annoying these odors can be harmful to your airways, it is therefore crucial to get rid of them quickly.

Eliminating an unpleasant air-conditioning odor

We will now do a list of actions you can take to get rid of these air-conditioning odours on your GMC Sierra:

  • Even though it may look obvious, the dirt that amasses in your car will encourage the expansion of germs and therefore bad odors, cleaning your GMC Sierra on a regular basis will allow you to eradicate many of the origins of these.
  • The best method is to clean the whole air conditioning system of your GMC Sierra with antibacterial and anti-fungicidal products. To accomplish this, please consult our guideline which clarifies in detail the procedure to stick to.
  • Change the cabin or pollen filter of your GMC Sierra: This filter which aims to protect against impurities from getting into the cabin of your car must be changed every year and can store bad smells, make sure you check its condition.

Avoid musty air-conditioning odors on GMC Sierra

Finally, last part of our guideline on air conditioning smells on GMC Sierra, we are now going to give you some suggestions to maintain your air conditioning system and avoid bad smells in your GMC Sierra:

  • Turn off the air conditioning 5/10 minutes before turning off the engine: In truth, always accomplish this step will allow you to dry a maximum of humidity in your ventilation circuit and thus limit the humidity.
  • Although it sounds basic, you don’t always have time to take care of your car, but rubbish is the first thing that triggers bad odors, so remember to keep your car healthy.
  • To be certain that the air conditioning of your GMC Sierra is always in good functioning order (air conditioning compressor especially), it should be run for 10 minutes every month.
  • Make certain that there is no leak on your air conditioning is important, in reality, the liquid is toxic and moreover the operation of your air conditioning would be downgraded in the case of a leak.

Whenever you have any further questions about the GMC Sierra, do not hesitate to consult our GMC Sierra category.