Jump to content

2014 GMC Sierra not cooling well

robmaxfli
 Share

Recommended Posts

robmaxfli New Member

robmaxfli

Posted
Posted

Howdy,

As the title states I am not getting nice cold air out of the vents. I measured vent temps and they are almost 70 degrees. On a 93 Degree day here in Texas.
Today I decided to evacuate the system, pull a vacuum that held , and then recharge to the correct amount of 21oz. Vent temps are still @ 70 degrees (85 degrees outside). The Low side pressure is 35 and High side is 192. The AC line going to evaporator is cold to the touch and sweating.
I did change the airflow from defrost to floor and those work ok - but it didn't get colder, The heat works great too. Not sure how to tell if it is a blend door issue. Has anyone blocked off the heater core?

thanks for any suggestions.

robmaxfli New Member

robmaxfli

Posted
  • Author
Posted

just in case this helps anyone, I was able to achieve 43 degrees out the vents after i bypassed the heater core. its 90 degrees outside here. I'm thinking about leaving it this way for the summer :)

JimCost2014 Senior Enthusiast

JimCost2014

Posted
Posted
9 hours ago, robmaxfli said:

just in case this helps anyone, I was able to achieve 43 degrees out the vents after i bypassed the heater core. its 90 degrees outside here. I'm thinking about leaving it this way for the summer :)

What year is your truck?

 

Have you checked your condenser to see if it is leaking? Very well known problem with these trucks.

Ed S Enthusiast

Ed S

Posted
Posted
On 7/10/2020 at 11:43 AM, MaverickZ71 said:

Common problem.  Lots of videos on Youtube on how to replace a blend door actuator.  

I wish there were more videos on replacing the left and or right vent actuators. Found one on youtube, short one that looks like a pain in the a** through the removed glove box opening. My left side a/c vents keep blowing warm air with the a/c on high. Comes out plenty cold on the passenger side vents. Most videos I saw on actuator replacement were on 2013 on down which are different.

  • 4 weeks later...
Oscar Azuara New Member

Oscar Azuara

Posted
Posted

i'm also having the same trouble with my 2014 silverado, i went to autozone and they told me that there is 3 actuators the left, right and main... wtf!!! now im back to studying ... its not the condenser i had that checked

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   1 Member, 0 Anonymous, 216 Guests (See full list)

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...