Jump to content

A/C with Air recirculation on????

Raiderse

Recommended Posts

majorsmackdown Enthusiast

majorsmackdown

Posted
Posted

I took my 2015 in recently with this complaint - every outside odor gets pumped into the cabin whether or not the recirc button is pressed, and in all circulation modes. I recently went on a long enough drive to try all combinations of buttons to no avail - car exhaust, diesel exhaust, fire smoke, cattle farms...

 

The dealer told me they could not reprogram the re-circulation door to close more. They said it's a program package - like a firmware I'm guessing - that can be uploaded to the vehicle, but they're not allowed to individually program items. I don't know if this is BS or what.. I do know I get nearly instant headaches from car exhaust and diesel exhaust - cattle farms are just annoying..

 

I've at least temporarily given up on the dealer and GMC to help and I'm trying this:

 

http://autoplicity.com/9015185-fram-cf11809-cabin-air-filter

 

I still get a hint of exhaust smells now and again but I think it's much better than before. I did make a trip to a waste transfer station (an indoor refuse dump).. the smell in one of these places is awful. I left the truck running, recirc on of course. The smell inside was probably 85 or 90 % better than outside.... At this point I'd recommend this cabin filter.... At least it's pretty cheap to try out.

  • Replies 30
  • Created
  • Last Reply
redwngr Senior Enthusiast

redwngr

Posted
Posted

Recirc still intakes a % of fresh air so that positive pressure can be maintained in the cab to prevent dust intrusion.

majorsmackdown Enthusiast

majorsmackdown

Posted
Posted

Recirc still intakes a % of fresh air so that positive pressure can be maintained in the cab to prevent dust intrusion.

I think that's the complaint most of us have - if I'm not where it's dusty - I'd rather risk that than get all the ass smells from outside...

07Softail Senior Enthusiast

07Softail

Posted
Posted

GM... Damned if they do...Damned if they don't!! Bunch of cry babies can't touch a re-circulation button when they crank the truck. Candy Asses!!!

 

RT

Elandi New Member

Elandi

Posted
Posted

I have the exact problem the service adviser told me there is a fix! I have to pay they to rig that door shut do it stays 100% closed. I cannot wait to get rid if this Terrain, it's days are numbered!

Elandi New Member

Elandi

Posted
Posted

I think that's the complaint most of us have - if I'm not where it's dusty - I'd rather risk that than get all the ass smells from outside...

Me too! Hate all the smells!

  • 8 months later...
Nathan Banks New Member

Nathan Banks

Posted
Posted

Really need a fix for this!!! I used to drive 99 silverado and never had an outside odor issue while a/c in recirculation. Kinda stinks...no pun intended but. WHY would a new truck have this issue. I would think technology has gotten better over the years. Not worse!!

Boardmember Senior Enthusiast

Boardmember

Posted
Posted

There are benefits to having a positive cabin pressure that outweigh the occasional observation of outside odors at 10%.

 

Buildings have to be designed to provide specified CFM of fresh air volume depending on a variety of factors. It's healthier for occupants AND it reduces dust infiltration.

 

Occasionally I can detect something I don't like - skunks or chicken houses anyone? - but it's minimal and clears quickly because of the 10% MUA (make up air).

 

To take the principle a little further, have you ever noticed when walking into a bank or hospital/clinic, upon opening the door you feel a rush of conditioned air? These buildings operate with a positive pressure and it keeps them from sucking in dirt and dust every time the door opens.

  • 3 weeks later...
152500HD New Member

152500HD

Posted
Posted

I have had my 2500HD Diesel LTZ in 4 times for the same issue. Of course now they are feeding me the 10% story.. I am going to try to hang in there a little longer and hope GM decides to solve this issue. I really like everything about my truck but this... When I am on the road I like to stop at rest stop and nap for a minute. I did this on last trip and could smell exhaust.. I will deal with the dust.. This problem needs to be addressed...

Thomcat Senior Enthusiast

Thomcat

Posted
Posted

I am wondering if you all still smell any outside odors like if your going through an area when where there is a smoke smell from burning or a sulfur smell maybe from stagnant water etc. through the vents with the A/C on even when you put the air in recirculation. I still get some of the outside odor didn't on my Fords. wondering if maybe some ducting is not sealed correctly or if this is normal for the Chevy/GMC?

 

I guess the simplest way to ask what I am asking would be do you still get some outside odor when you have your a/c on and press the cabin air recirculation button?

Simple answer is yes, even on Recirc there is a small amount of makeup air introduced as a safety measure. In the 50's even given the poorer quality of door seals with the vents closed you could ride over a bunch of dead skunks and not smell a thing. It was GM that first came out with their "flow through ventilation" crap in the 60s and 70s, may have been the result of a CO lawsuit, which kept the vent cracked and the fan on ultra-low speed whenever the engine was running. TV ad showed a smoke bomb going off in a closed car with the vents closed and the interior gradually clearing as the engine ran.

 

I don't know if current models use the ultra-low fan setting but there is active venting when the HVAC is in use even on recirc .....now when you run over a dead skunk with windows closed, you will smell it

jlilnc14 Enthusiast

jlilnc14

Posted
Posted

I have the exact problem the service adviser told me there is a fix! I have to pay they to rig that door shut do it stays 100% closed. I cannot wait to get rid if this Terrain, it's days are numbered!

Keep us updated!

152500HD New Member

152500HD

Posted
Posted

Took the Ford F250 diesel lariat for a drive to possibly trade in... The chevy interior is so much nicer, more comfortable, steering, ride,power, everything better with my LTZ... Made my decision easy to keep my truck and figure out how to solve the venting problem.. Please GM.. Offer us the option of fully closing this vent.....

Donstar Senior Enthusiast

Donstar

Posted
Posted

I guess I'll stick my neck out on this one. I am happy that a little fresh air is always allowed in the cabin. These vehicles are made pretty air tight and I believe a family riding in this enclosed box could potentially reduce oxygen levels for the driver. Maybe this is a ridiculous, but I know I feel more alert with "fresh" air!

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,965
    Total Members
    8,960
    Most Online
    DaleB
    Newest Member
    DaleB
    Joined

  • Who's Online   5 Members, 0 Anonymous, 1,079 Guests (See full list)

  • Latest Articles

  • Posts

    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      You must have that upgraded gvw package which is only available or at least was in 2025 with the diesel engine for the 3/4 ton and that gave the truck physically the larger 12.0 ring gear rear diff and the 3500 rear spring pack. There is a difference in what the diff housing looks like externally as one tell tale and also your truck should have the upper overload spring pack and the frame pads that the pack goes up against.    The pressure the tpms system kicks the alarm in on a stock setting truck, that is a good question and was just from what I recall but I doubt I made any notes on it as I knew for the rear that it was not at all what I was after regardless either. Being that you have a diesel and if running on stock tires the minimum pressure on an empty truck seems to be around 50 psi from hearing of those that have weighted the front axle but the rear axle is very similar in weight to a gas truck and again a near empty truck on the rear could go down to 35 pounds at minimum. However the weigh scale is the proper way to know for sure as a guide.    As to changing the readings on the dash from metric to the US measuring system, oh yes that is done easily but what I was attempting to explain was that I can't pick and choose items I want to have in US and those I still want in the metric system at the same time as its either all or none. For example lets say you drove into Canada and switched your dash over to metric so your speedometer read in km an hour, well then your reading kilopascals on your tpms readout and your wife looks over and says what the hell is that saying in the tpms screen and you say "darned if I know, I think its Chinese" !
    • Chuck FB
      Some Assembly is Required

      By Chuck FB · Posted

      This is partly why I decided to have switched over to Amsoil SS as a way of hopefully preventing the buildup of the sludge/carbon on the pistons and clogging of the oil control rings and the carbon that would cause the compression rings to stick in their grooves as well as stay cleaner up top of the heads in the valve train in the first place, an oil that has tested better by third party testing over typical shelf oil and also doing my best to run relatively short OCI. However in saying that I don't think there is any way to easily prove the oil I was using prior allowed for a buildup at the OCI I was doing, nor in the other direction to make claims the Amsoil is keeping everything clean either. There really isn't a window into the engine is there to know anything for certain even if oil samples were taken for example that showed still healthy oil being dropped out of the oil pan other than engine tear downs that extensive and expensive testing of oils does to actually visually see what is really going on inside the engine. I wish there was some easy method of seeing what is going on but I don't happen to be aware of that if there is.  
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      My truck is a ¾ ton but my placard also says 80 for the rear tires, I think I might have the upgraded suspension to the 3500 series maybe.   I put my air down to 60 and the light was still on, and there was no way I was putting over 60 psi in the rear empty and not towing because I knew the actual number Toyo gave me and I didn't wanna ruin the center of my tires!   And you actually can change it in the settings from metric or is and it will show kph or mph then when you go into your tire settings it will be either psi or kpa, but it would be nice to just change it directly on the tire psi page 
    • Grumpy Bear
      Some Assembly is Required

      By Grumpy Bear · Posted

      Common Sense Assembly   Your driveline is forgiving of the occasional mistake. It will even often forgive the random serious blunder. But it will not forgive a continuous bad habit.      What? Not everything needs to be a five thousand word essay.       
    • Grumpy Bear
      Gas Prices

      By Grumpy Bear · Posted

      We drove about 15 minute east today to visit a friend and saw a steep increase in price in the same county. About 50 cents a gallon steepper. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...