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  1. #1

    Default Acceleration grinding/hissing noise? C1500

    I have noticed ever since I owned my 97 C1500 that after a certain speed, when I press down on the gas pedal, it will make sort of a hissing grinding noise. It's usually after about 25 mph. I will barely tap and I will hear that noise while I am on the gas pedal then I will let off and the noise will sort of linger for a second or two. It doesn't make the noise when I'm in park but only when I am in motion. Any ideas on what it is? Thanks for the comments ahead of time!

  2. #2

    Default

    It could be almost anything, u-joint, rear pinion bearing. Does that drive shaft have a midshaft bearing? You could always jack the rearend up and put in gear and see if you can find the source of the sound. I had the same kind of issue and noise. It turned out to be the heat shield on the exhaust. Mine only did it under load so I had to jack up the rear and have my wife get in and press the brake and gas at the same time while I laid under the truck.
    Last edited by Pikey; 10-03-2013 at 01:47 PM.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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