Jump to content

2000 Silverado 2500 6.0 AC Issues

insidethreat07

Recommended Posts

insidethreat07 Enthusiast

insidethreat07

Posted
Posted

As the title states I have a 2000 Silverado 2500 6.0 with some AC issues. Back in march I put a new compressor, orifice tube filter, and accumulator in. About a 3 weeks ago the air hasn't been as cold as before, it's been cool but not cold. The  AC compressor has been kicking off and on like clock work. I thought maybe the high pressure switch on the accumulator  was bad so I replaced it and same thing. So I bought the refrigerant in a can yesterday and hooked it up and the PSI on the guage read about 35 PSI. So I put it up to about 40 PSI and and instantly got colder. Now today after getting home from work the air is back to being just "cool", so I just hooked the guage back up and while the clutch is engaged I can watch the PSI needle steadily drop to about 25PSI, then the clutch disengages and then I can steadily watch the PSI climb to about 55-60PSI then the clutch engages again and the PSI drops again, and this pattern just continues. Also the compressor is engaging and disengaging even the the AC button in the truck if off and just the regular air is on.

 

Any tips on what to do next? No I haven't added any dye yet to see if it's leaking anywhere either. Trying to make that a last resort

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted

The pressure reading while the pump is on is the more important reading. 

 

The A/C pump may activate if your on certain vent settings, such as defrost - even if you have not selected A/C. 

 

Sounds like you have a leak if the pressure and performance is diminishing with time - Especially if adding more Freon makes it work better again. 

 

You might something like this: 

 

 

 

 

 

 

 

81xWJPEcHFL._SY879_.jpg

insidethreat07 Enthusiast

insidethreat07

Posted
  • Author
Posted
1 minute ago, starman8tdc said:

The pressure reading while the pump is on is the more important reading. 

 

The A/C pump may activate if your on certain vent settings, such as defrost - even if you have not selected A/C. 

 

Sounds like you have a leak if the pressure and performance is diminishing with time - Especially if adding more Freon makes it work better again. 

 

You might something like this: 

 

 

 

 

 

 

 

81xWJPEcHFL._SY879_.jpg

I bought the cold AC brand that also has the leak stopper in it as well.

4ba36271-fcfc-4d34-b03d-affe302ea99f_1.e

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted

That A/C pro stuff is pretty expensive. I usually get the generic 12 ounce cans for a dollar or two each and I buy about 50 at a time, just to stock up. 

 

Freon is Freon. Brand doesn't matter. 

 

As for the stop leak, I have had better results with a product that is specifically designed to "stop leaks", rather than products that just contains some stop leak additives. 

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

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,837
    Total Members
    8,960
    Most Online
    bellssn690
    Newest Member
    bellssn690
    Joined

  • Who's Online   4 Members, 1 Anonymous, 544 Guests (See full list)

  • Latest Articles

  • Posts

    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      Interesting, I suspect I would have fueled up in Lee Vining as the day prior I would have filled up either in Laughlin or near there and maybe again before I entered Death Valley and once out the other side late that evening as I kept on driving into the night up near Lee Vining. Next morning I most likely fueled up in LV before heading over Tioga Pass into ( as I refer to it as "Yose .... Mite" 😁 ). And again that was 19 years ago but the price then must not have jumped out at me like the 5 bill a gallon theme of nutty cult hippy country Big Sir or head so far up their rear Aspen. I'd be curious to know where the highest prices are in the lower 48, I probably would not be far off to guess somewhere in Cali forn ie. Coldfoot and Prudhoe bay may have those prices beat but that is a whole other world up there and when prices are more normal elsewhere that is about what they can be up there I believe in no mans land. Anyway interesting that the 395 corridor is hosing people and the thing is, its tourist season and its not like there are a lot of competition options when driving up that highway from what I could see. Yup, big ole Boaterhomes and various other RV's ahead and behind me at the Yosemite entrance gate and they have to get their fuel somewhere.  
    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Correct.  2019-2021 model years are serviced by a different p/n.  19420611.  Recall 2021s use 19420611.   The recall engines 2022-2024 model years are serviced with 12740076.     The difference between 19420611 and 12740076 is GM changed injector size for 2022.  The injectors are smaller on 12740076 with smaller injector bores in the cylinder heads to match the smaller injectors.  So you can't install a 19420611 in a 2022-2024, and you can't install a 12740076 in a 2019-2021.     Both engines are the replacement engine p/ns that are in the L87 recall.  So both of these are the updated engines.     Here's a version of the L87 recall with the p/ns for all the parts needed.    RCRIT-25V274-7075.pdf   Note it shows 19420611 and 12740076 with an asterisk to a footnote "Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which part to order if two or more part numbers are listed for the same part, as it may vary by vehicle options."    
    • 2017Z
      2020 Trailboss 6.2 replacement

      By 2017Z · Posted

      Looking for advice from this group. Took my flawless 2020 6.2 TB to an unnamed shop for routine rear brakes and oil change. Tech forgot to put oil back in after the full service and needles to say, destroyed my engine.  It’s all on their shop video so they are responsible.   I had my Chevy dealer do the analysis and they confirmed its compromised and said engine replacement. The manager said they only get GM reman engines from GM with full 3 yr warranty and the one they would put in is not same as what’s they are swapping out on 21-25 for recall.    I am looking for advice why that would be a different engine because obviously I had the good 6.2 year and replacing it has my concerns with that recall for 21-15   Also what’s the pros and cons of accepting the engine swap vs telling the shop that bricked the truck to pay up so I buy a new truck. I’m concerned about stigma resale eventually if I just decide to get rid of it after the swap or other issues showing up after the swap out.  
    • GN2018
      AFM Disabler Question

      By GN2018 · Posted

      Just looked up my records.  I've never gone over 5000 miles between oil changes.  At 46K miles, I have 10 oil changes.  I hope that will help.  I also installed the disabler last year.  I've still had a few times when it didn't seem to engage (which I can tell because the start stop feature kicks in), but for the most part, I think it's working.  For some reason, GM did not include the number of cylinders running in the information screen like I had on other models.  In my Cadillac, it shows me when it's running on 4 cylinders on the fuel milage screen.  I can't find that on my '21 Denali.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...