Jump to content

Vacuum leak??


Recommended Posts

Posted

I have a 2003 Sierra 5.3 2wd, no check engine lite, no codes, but on freeway, I have an annoying whistling sound like a vacuum leak.  I can't find it anywhere.  Do you have any suggestions??

Posted
1 hour ago, Skimanz said:

I have a 2003 Sierra 5.3 2wd, no check engine lite, no codes, but on freeway, I have an annoying whistling sound like a vacuum leak.  I can't find it anywhere.  Do you have any suggestions??

Where does it sound like it is coming from? Is it speed only or can you get it to make the noise while you're sitting still and throttle up?

Posted

Under speed only.  I cannot duplicate it sitting still.  So it does the pretend-turbo whine when it is under slight load, going 65+mph on freeway.

 

It sounds like off the intake manifold or power brake booster, somewhere around the front left, I believe.

 

Posted
5 hours ago, davester said:

Are you sure it's not wind related?  Like a door seal failing or window slightly cracked?

This what I am thinking. Get some painters tape and start taping openings

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    250.3k
    Total Topics
    2.7m
    Total Posts
  • Member Statistics

    342,688
    Total Members
    8,960
    Most Online
    NN16HD
    Newest Member
    NN16HD
    Joined
  • Who's Online   1 Member, 0 Anonymous, 471 Guests (See full list)

×
×
  • Create New...