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  1. #1
    Jr. Apprentice jay2dc's Avatar
    Join Date
    Sep 2008
    sandy hook CT

    Default Rumbling/groaning

    So today i drove the equinox around town quite a fair deal. by the end of the day late at night there was a very distinct and audible rumbling/groaning sort of noise coming from the front center area under my car.

    It was raining all day today, and the only other times this has happend before have been in torrential downpours. so im pretty positive whatever it is is caused by water?

    At first i thought it had something to do with the engine/intake-exhaust however when i open my window to listen if i can hear it better outside while driving i cannot, and when i parked in the garage and gave her some gas to see if i could hear the rumbling in the quiet of the garage i heard nothing.

    so since i only heard it while driving it leads me to believe i has to be something with the tranny/axle/tires.(?)

    im assuming someone else has to have encountered something similar. (seems like most people have with the 'nox).

    any info would help. only info i could find was possibly water into the manifold?

  2. #2
    Jr. Apprentice jay2dc's Avatar
    Join Date
    Sep 2008
    sandy hook CT


    Took it to my trusty GM place today. Stated it was a malfunctioning EGR valve and a leaking pipe.

    fair enough. i bought it. came back home and checked out some info online.

    Turns out the 'leaky' pipe is COMPLETELY cracked and corroded in half!

    crazy. cracked in half due to corrosion. gunna cost round 300 for the parts to replace. may do it myself and save me some money. if its not done the car wont pass inspection, and

  3. #3


    Does this only occur when in heavy rain? Mine (05) does the same thing.
    What pipe is cracked and is this a safety hazard (exhaust leakage into the car)?
    What was your final result. Were you able to fix it yourself or did you let the shop do it?

  4. #4


    How many miles are on it? Doesn't GM have to cover exhaust components for an extended period? My wife's 08 torrent makes some terrible noises when it is cold or raining. The dealer has replaced motor mounts twice and a trans mount. The noise goes away for a few months and then returns. We take it in, they put new mounts on and all is good. (until it is out of warranty and my issue )
    Last edited by Pikey; 12-15-2011 at 11:15 AM.

    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,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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