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. 

Recommended Posts

Chevrolet recommends AC Delco Diesel Exhaust Fluid in 2021 Sliverado HD Duramax. Is their a difference in AC Vs Blue? Most  Stores don't carry AC brand.. is it worth ordering online or is any DEF fluid okay? 

Link to comment
Share on other sites

Any DEF will work fine.  The main thing is to get it as fresh as you can. It does have a shelf life.  If you have a truck stop that has it at the pump that is the best, fresh, kept underground so it is not in heated area and is the least expensive.

  • Like 1
Link to comment
Share on other sites

Many many threads on this subject on the sites that focus on the 6.6

 

Bottom line is use whatever you want.

 

I'm currently using bulk from a truck stop pump, but that is not convenient for everyone. 

Before we moved, this was not convenient so was a 2.5gal jug user for many years. 

 

Only ACDelco branded used in any of mine was what may have been it it when delivered new. 

 

Peak now has two versions.

Save your money and use the original Peak Blue if you decide to use that brand.

 

Manual says:

Use only DEF that is GM approved, or fluid containing the
API certified or ISO 22241 label.
The use of other fluids could damage the system, requiring
costly repairs that will not be covered by the vehicle warranty. 

 

You are going to find that all brands will have ISO 22241 on the label.

 

Link to comment
Share on other sites

  • 2 weeks later...
  • 2 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
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.

 Share

  • Similar Content

    • By Cross1992
      Hello, 
       
      I am about to buy a 6.6L Duramax 14' 2500hd Sierra with 136K on it. But I just learned it has a small heating core leak, the dealer is replacing the whole core prior to purchase. Should I proceed with this purchase? Or is this the sign of this truck going down hill. The service recorded were regular until 2018 then the car fax no longer shows any updates.  
       
      Any help would be appreciated, I have a 92 Sierra with a 5.7L small block so the diesel world I am not as comfortable with. Also do not want a newer truck as I do not want to deal with DEF and I would not be able to do a delete. 
    • By 04z71crew
      Brand new oem bosch injectors for an LML 2011 through 2016. 
      $2,600 for the complete set of (8) shipped anywhere in the contiguous U.S.  NO cores are required. 

    • By jacob keese
      I am looking to add an elevated idle feature to my 2018 Chevy sliverado 3500 duramax Dually. My truck is currently not set up with the pto feature. I currently idle my truck for about an hour a day and I am wanting to add an elevated idle to get my truck to operating temp faster to prolong the life of my truck. What are y’all adding to the truck for aftermarket parts to achieve this since the dealer is saying it’s not possible with gm parts. What else are y’all running for tuners to increase mpg that will work great with a fully deleted truck. 
         
    • By brisk00
      I just bought a used 2021 AT4 with the 3.0 with about 3,800 miles.  This is my first diesel but I have read a ton of documentation, forums and Facebook groups specific to the 3.0 Duramax.  When I got the truck I scrolled through all of the information in the DIC.  I noticed that the DEF gauge is a about a third full.  I figured the previous owner may have done a lot of towing with it because at 3,800 miles it should not be that low.  Am I correct in that assumption?  Should I go ahead and fill it up or wait until the truck tells me to?  How much do I fill it? Until full?
       
      Thanks!
    • By CByz
      So recently I cracked the bell housing to my transmission and it lost all the oil, so I’ve been looking at good used transmissions. My question is what years are compatible with the 2006s? I’ve heard the plugs vary year to year making some incompatible with different years. Any advice would be awesome. 
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    241.5k
    Total Topics
    1.4m
    Total Posts
  • Member Statistics

    305,777
    Total Members
    8,960
    Most Online
    Scott MBM
    Newest Member
    Scott MBM
    Joined


×
×
  • Create New...

Important Information

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