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    Help diagnose a power steering issue on my 99' GMC

    The truck: 1999 GMC K-3500 (old body style), 5.7 engine, 4L80-E, with hydroboost brakes, 232,000 miles, I'm the original owner, this is the OEM power steering pump original to the truck. Lately, if you turn the steering wheel fast while driving slowly, there's a popping sound coming from the...
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