Weird "grumble" noise at part throttle...

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by travisn, Nov 5, 2011.

  1. travisn

    travisn Rockstar

    So my 99 5.3l Sillverado has a grumble of sorts at part throttle (about 5%). It kinda sounds like an exhaust leak but it goes away once I actually get on it. Almost feels like a tranny issue but sounds like it's coming from the engine. It does have a slight manifold gasket leak but I think it's unrelated.

    Ideas?
     
  2. travisn

    travisn Rockstar

    bump please.
     

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