Jump to content

CEL with Service Emissions System message on 6.6L GAS


Recommended Posts

All,

   I have a 2021 GMC Sierra 2500HD with the 6.6L gas engine and roughly 8K miles. At the end of last week I was on the highway and my CEL came on and I received a message that said "Service Emissions System within 7 days" or something to that effect. I called my dealer right away and they booked me out a little over 2 weeks and now the CEL and message went away. The truck never ran any differently. Everything I find on the web refers to the Duramax and a similar message. I'm still going to have it checked out but 1) any one else have this message on the gas engine and what was the cause, 2) should I be alarmed that I can't get it in sooner, I only put about 100 miles a week and 3) should I be relieved, alarmed or neither that the code went away after running it for a few days (maybe 50-60 miles). Thanks!

Link to comment
Share on other sites

1). Not yet, truck only has 1,300 miles.

2 & 3) . Since the CEL is no longer illuminated, I'd be relieved, but would still keep the dealer appointment.  Do you still have OnStar activated?  If so, they may be able to tell you what the code is, and provide input on what you should do.

The Owner's Manual speaks to this in a generic fashion.  The '22 Owner's manual is page 117 & 118.  Your manual may be different pages.  If you have downloaded the pdf version, you can do a ctrl+F to bring up the search box, and then type the word emission to help you find the pages that cover the very generic explanation.

Hope this helps. :cheers:

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.

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.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    245.8k
    Total Topics
    2.6m
    Total Posts
  • Member Statistics

    333,234
    Total Members
    8,960
    Most Online
    Donald Dolan
    Newest Member
    Donald Dolan
    Joined
  • Who's Online   4 Members, 0 Anonymous, 847 Guests (See full list)



×
×
  • Create New...

Important Information

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