2022 Tahoe air flow on forward facing vents very slow when dash or foot air flow enabled

[WalleyeMikeIII]

I agree with you assessment in that with two or three turned on, they'll be weaker overall, however, with them all turned on for example, the only one that really seems weak is the dash vents. The floor and defrost vents sound like air is really flowing while putting your hand in front of the dash vents you can feel only a trickle of air coming out. It's expect them all to be fairly equal albeit slower than one individually by itself, not where one is so slow that it's virtually useless while the others are blasting air. But maybe I'm just over thinking this. I've got go in to the dealer for a recall and retrofit soon, so I'm going to ask them.

Can't say I have ever even attempted to do what you are doing, usually when I need defrost, it is cold outside, and in that climate, I prefer the heat on my feet to in my face...but, let us know what you find out.

 

[tahoe81]

Can't say I have ever even attempted to do what you are doing, usually when I need defrost, it is cold outside, and in that climate, I prefer the heat on my feet to in my face...but, let us know what you find out.

Yeah I guess the only way I even noticed this was because 99.9% of the time I've got air coming out of the dash vents toward me. If the windshield starts to fog up, I'll usually the press the button so the fan location goes up to the windshield in addition to the dash by pressing this button:

https://imgur.com/BUGsVd3

That's when I noticed that the fan speed out of the dash vents slows to nothing with the windshield fan location enabled. It does the same thing for feet though. If I've got dash only fan location enabled and press the feet fan button, the feet fan speed is very high while the air coming out of the dash vents is very slow

 

[StephenPT]

Your best bet is to go check out another one on the lot when you visit the dealership and compare it to yours. It's possible that the blend actuator motor is not working correctly - but if you're able to get strong air to flow out of the defrost, dash and floor vent locations, when individually selected, then it's likely working fine. Having air come out of both floor and dash outlets is just a flap in the air handler that stops part way between the two locations. It's possible GM programmed it to be more biased toward the non-dash outlets when another location is selected simultaneously.

 

[tahoe81]

Your best bet is to go check out another one on the lot when you visit the dealership and compare it to yours. It's possible that the blend actuator motor is not working correctly - but if you're able to get strong air to flow out of the defrost, dash and floor vent locations, when individually selected, then it's likely working fine. Having air come out of both floor and dash outlets is just a flap in the air handler that stops part way between the two locations. It's possible GM programmed it to be more biased toward the non-dash outlets when another location is selected simultaneously.

Thanks. Definitely the plan