Jump to content

My A/C smells on my 2020 Chevy truck


Recommended Posts

Same issue on my 2019, i had to take it back to them(dealer) and turn on the "AfterBlow" feature. This will turn on the blower after turning off the car (after 20-30 minutes) for a 1-2 mins to take the water off the evaporator (in the cab cooler). I had them run some ozium to kill the bacteria.

I replaced the cabin air filter with the wix filter that has carbon in it to help but going to the dealer is the best thing to do. They have to verify that there is a smell. (IDK what would happen if the tech didnt smell it).


I tried to fix it myself by having the blower running for 20 mins on a hot day without the motor running(so the AC wouldnt turn on).

Didnt work too well the smell can back in a few weeks.

Link to comment
Share on other sites

Definitely turn on the afterblow.


Dealer had set mine for afterblow during the initial prep so no crap even has a chance to grow from moisture and build up on the evaporator.......no smells from A/C.

  • Like 1
Link to comment
Share on other sites

Yes! I’ve had the same issue on my 2019 that started last summer when I first got the truck. The dealer said it was normal and he had it in every car he owned. Well, I never had it in any car I’ve owned, not even a 15yr old junker so he must be from another planet.


I didn’t have time to deal with it and once the hot weather went away, so did the smell. I do plan to take it in again this summer if it comes back. I’ve only had it smell on 90+ degree days. Does yours smell all the time?

Link to comment
Share on other sites

What you are smelling is  caused by the build up of mold and bacteria on your evaporator coil.  Warm climates (high humidity) are more prone to this.

Edited by elcamino
Link to comment
Share on other sites

Hi, everyone. This is certainly not what we wish to hear. Our team is more than happy to reach out the dealership on your behalf. To do so, please send an email to [email protected] ATTN:Forum Username/Gm Trucks  with your contact information, VIN, brief description of your concern,  and preferred dealership. We look forward to hearing from you. To learn more about GM's privacy policy, please visit http://bit.ly/2h3ZUnC. 

Aleigha W. 

Link to comment
Share on other sites

  • 4 years later...
2 hours ago, smit303 said:

I had a dead mouse in my cabin air filter. You might want to check it out.

Yikes how did you get it out as there is only enough space to pull the filter out, i usually rip a piece of the filter box cardboard and try and create a dam on the underside of the filter so stuff doesn't just fall past it once you pull the filter out.


But to those with smells and you have never changed your filter? Give that a try, even better K&N makes them and are only double the price of a standard one, and of course it will be the only one you will ever need to buy again. Plus I here it helps with the flow of your cooling and heating system as like with a k&n air filter it is higher flowing then stock.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.