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Rattle coming from the front of the motor
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12-18-2005, 11:20 PM
ChevyHighPerformance
Hummer Professional
Join Date: Jul 2005
Posts: 278
I hear the same noise only for the first minute or so. It seems that the PCM is programmed to engaged the fan even though the engine is cold perhaps to place a laod on the engine to help it heat up and get into closed loop.
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