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 Shea 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

Shea answered 9 years ago

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

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dandyoun answered 9 years ago

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.

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