My 94 gmc Sierra 2500 lost power recently and now has a weird whistle sound coming from the engine, but only when I'm in drive driving. It almost sounds like a turbo winding up. My truck don't have 1.

Asked by Jun 13, 2014 at 09:47 PM about the 1994 GMC Sierra 2500

Question type: Maintenance & Repair

The engine is a v8 5.7L 350.

3 Answers

115,855

Sounds like possibly a vacuum leak.

Where would the leak generally be coming from is that be the case? I'm just very unfamiliar with this kind of stuff.

115,855

Honestly might near anywhere around the top(intake) portion of your engine. Look and listen for loose/broke hoses around the top of the engine. Follow the hiss sound you are hearing. Hose could be the size of a pencil or up to the size of a large thumb.

1 of 1 people found this helpful.

Your Answer

Sierra 2500

Looking for a Used Sierra 2500 in your area?

CarGurus has 168 nationwide Sierra 2500 listings starting at $5,795.

ZIP:

GMC Sierra 2500 Experts

  • #1
    Rowefast
    Reputation
    160
  • #2
    tennisshoes
    Reputation
    90
  • #3
    JOHNG123
    Reputation
    60
View All

Related Models For Sale

Used GMC Sierra 1500
1,137 Great Deals out of 65,382 listings starting at $1,995
Used Dodge Ram 2500
173 Great Deals out of 5,237 listings starting at $2,500
Used Ford F-250
430 listings starting at $2,995
Used Ford F-150
2,775 Great Deals out of 211,556 listings starting at $1,400
Used GMC Sierra 3500
5 Great Deals out of 214 listings starting at $9,900
Used Chevrolet C/K 2500
209 listings starting at $5,498

Used Cars For Sale

2004 GMC Sierra 2500 For Sale
3 Great Deals out of 35 listings starting at $5,795
2000 GMC Sierra 2500 For Sale
37 listings starting at $5,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.