1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

gmc 366 big block question

Discussion in 'Chevy Trucks' started by chev_4x4, Sep 13, 2014.

  1. chev_4x4

    chev_4x4 Senior Member
    Messages: 128

    Have a 1990 gmc topkick with a 366 big block. Want to change the oil but don't know the oil capacity of it. Looked online several times could not find it. Coming here for all the answers I can't find anywhere else.
     
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,974

    20 quarts if I remember. Or there abouts
     
  3. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,974

    I'm thinking I'm wrong. I can see the sharpie number, but I'm thinking that's the cat motor trk. Try 10 first
     
  4. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    Start with 8 quarts, see where it is on the stick, add as needed.
     
  5. maxwellp

    maxwellp PlowSite.com Addict
    Messages: 1,112

    It should have an 8 qt pan. But? Try 6 and see if is on the stick and go from there.
     
  6. chev_4x4

    chev_4x4 Senior Member
    Messages: 128

    Thank you very much
     
  7. peteo1

    peteo1 PlowSite.com Addict
    Messages: 1,660

    Why not call a GM dealer instead of listening to a bunch of guys on the Internet who aren't all that sure. Just because I'm a good sport I'll play too...start with 7 quarts and go from there
     
  8. leolkfrm

    leolkfrm PlowSite.com Addict
    Messages: 1,427

    are you using a 1 quart or 2 quart filter? they came with both....should be 7 to 8 quarts