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GMC Sierra 2500HD. Whistling noise around 1500 RRMs.

dbonin16dbonin16 Member Posts: 1
edited January 2016 in GMC
I've got a 2007 GMC Seirra 2500 HD. It started making a high pitched whistling noise at around 1500 RPMs. It only lasts for a couple of seconds. If I take my foot off the gas or I get above 2000 RPMs, the noise stops and it only happens once in a while (not every time I drive it.) If anyone has any ideas, I would appreciate it. Its driving me nuts!
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Comments

  • cmhj2000cmhj2000 Member Posts: 381
    Multiple things but an exhaust manifold leak would do this
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