Air conditioner

Asked by May 04, 2017 at 09:47 AM about the 2004 GMC Sierra 2500 4 Dr SLT 4WD Crew Cab SB

Question type: General

The air is working but their is like and air mist that is
coming out in the driver side or at least you can see
the air is this something I need to be worried about
the air is really cold

1 Answer


Not to worry. This normal to sometimes see a fog of moisture or even ice crystals when your system is working really well and it is condensing off the moisture in the air around you. Like exhaling on a very cold day. I would guess it is very humid where you are. A revved up engine makes the A/C work even better, sometimes to a point where your evaporator (in the "heater box") ices over and blocks your air flow. If that happens, turn off the A/C until the ice melts off and drips a puddle under your truck. When you turn your A/C back on, run your fan even faster, but don't run it on "Max A/C", so to keep it from refreezing. I have lots of refrigeration experience and get this question all the time. Your A/C is running fine!

Your Answer

GMC Sierra 2500 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used GMC Sierra 2500HD
33 Great Deals out of 1,268 listings starting at $3,600
Used GMC Sierra 1500
238 Great Deals out of 10,311 listings starting at $1,775
Used Chevrolet Silverado 2500HD
25 Great Deals out of 1,218 listings starting at $4,995
Used Chevrolet Silverado 1500
169 Great Deals out of 10,258 listings starting at $2,230
Used Chevrolet Silverado 2500
6 listings starting at $7,999
Used Dodge Ram 2500
8 Great Deals out of 80 listings starting at $2,100
Used Ford F-250 Super Duty
29 Great Deals out of 664 listings starting at $1,790
Used Ford F-150
637 Great Deals out of 9,058 listings starting at $1,995
Used GMC Sierra 3500
7 listings starting at $16,888
Used Toyota Tundra
32 Great Deals out of 1,369 listings starting at $5,871
Used GMC Sierra 1500HD
4 Great Deals out of 9 listings starting at $4,995

Used Cars For Sale

2004 GMC Sierra 2500 For Sale
1 listings starting at $9,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.