Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

A/C System Not Charged From Factory, 2018 Sierra 1500

Recommended Posts

I purchased a new 2018 GMC Sierra in February, and I'm in MN where it was freezing up until May, so I didn't get a chance to test the A/C.  What I did notice was a hissing sound during normal operation and it bugged me so sometimes when I turned the A/C on and back off, it would sometimes go away.  It was strange and I brought it up to the dealer in March or April and they dismissed it as normal... Well when it finally got warm and I wanted the A/C, sure enough it did not work!  I took it in and they determined it was never charged, so they charged it and found no leaks.  Well it just so happens the guy in the waiting room has a 2018 Sierra also and had the same issue, and says a handful of other people did at this dealership also.  I got the 10 year warranty so if it ends up being damaged because there was no freon/lube in it, they will have to replace it within the 10 years at the very least, and it's on file as a repair in my history.


So, did anyone else experience this like I (and at least a few others) did?

Link to comment
Share on other sites

The compressor shouldn’t of been damaged as it shouldn’t of cycled without the system pressure. Curious if it had a vacuum on it though. Without a vacuum you could have moisture in the system however. 

Link to comment
Share on other sites

If it was all sealed up in a factory setting I am sure your fine. Otherwise the dryer would be shot and moisture in the system. With low pressure the compressor will not go on. Shocking the quality control GM has. 

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.


  • Similar Content

    • By Bhodges52
      I have a 2016 Silverado 1500 Ltz and the radiator fan stays on the entire time the truck is running. Also the ac don’t get cold until 10-30 minutes. Then is blows super cold all day. I changed the coolant temp sensor and disconnected the battery for 10 minutes and it still doing the same thing. I’m not getting any codes and my gauge on the inside is reading correctly and the temp is at the correct temp. Any ideas? 
    • By Elijah Paul
      hi everyone,
      ive looked high and low with no luck, so apologies of this is directly cited somewhere.

      The plastic grooves/housing where the blower motor twists into place under the glove box, are brittle and broken. Therefore, my blower fan will not stay in place.
      Is that plastic housing or assembly core sold as a stand alone part? Trying to figure out a way to get the blower motor secured without duct tape or something else.
    • By Blake4774
      So I have a kit I bought awhile back including radiator, fan shroud, dual fans, temperature sensor, & wiring. I'm curious to if ill need anything more to make them work with my A/C. My kit only came with one relay & I was told earlier this week that dual fan setups are meant to be used 1 fan for cooling, & the other for the A/C...
      I'm a newbie at such things.
    • By JustRangerThings
      Morning y'all! Is there a kit i can purchase to convert from r12 to r134a? I tried the little autozone kits and they do not fit my truck. Its a 1992 C1500 with the TBI 350 (5.7)
    • By JakeStone
      My 2003 Silverado 5.3 is blowing cold air through the passenger vents but hot air through the driver side. I replaced the blend door actuator in hopes that the manual climate control had gone and that’s why drivers side was only blowing hot but the Dorman actuator from O’Reilly’s didn’t solve the problem. Any and all suggestions are appreciated it’s starting to get hot in Vegas! 
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    Total Topics
    Total Posts
  • Member Statistics

    Total Members
    Most Online
    Jesus Solis
    Newest Member
    Jesus Solis
  • Who's Online   7 Members, 0 Anonymous, 620 Guests (See full list)

  • Create New...

Important Information

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