Question about GMC Safari

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I would like to know the bolt numbering "layout" for the plenum on a 1994 GMC Safari 4.3 CPI engine as well as....the sequence to tighten the bolts. I know the torque is 124 in-lbs, but I dont have the layout, nor the sequence to secure them. Thanks, ED

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  • ehighdvm Feb 03, 2010

    HI KL, thanks for the photo, I was able to download it, (the haynes Manual dose not have this diagram), but I also need to know the sequence to replace/secure/tighten the bolts. I know it is important to do it in a special sequence, since the plenum is aluminum. Thank you for your reply!

  • ehighdvm Feb 03, 2010

    OH, OK...I thought there would be a "cross-tightening" sequence of some sort, like 1,5,9,3.....etc.
    Thank you very much for your help!!!!

  • ehighdvm Feb 03, 2010

    Excellent help!!!


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Hello Ed.
Here is the numbering sequence for the upper intake.
Not sure which link will work so I added a couple for you.

<a rel='nofollow' href="" target="_blank"><img src="" border="0" alt="Photobucket"></a>

If you need more information let me know.


Posted on Feb 03, 2010

  • 2 more comments 
  • FUBAR Feb 03, 2010

    Maybe this one will work.

  • FUBAR Feb 03, 2010

    Hello Ed.
    The sequence is there.
    Follow 1 through 10.

  • FUBAR Feb 03, 2010

    I would tighten them half torque through the sequence first then the full applied torque value on the second pass.

  • FUBAR Feb 03, 2010

    Hello Ed.
    It can be confusing.
    Goes against what we were taught many years ago but when you look at the design of some manifolds it begins to make sense.
    Hope your repair goes well for you.
    Thank you for the rating !


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