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  1. #1

    Default noise after startup?

    So i just noticed this today, i think its happened like 5 times or so today, as i start the truck up after it turns over and everything i hear i kicking sound on my passenger side sounds kind of like its hitting the fire wall, no idea what it is the truck just hit 120,000 miles today, going to be doing an oil change soon and switching to synthetic but im not sure if thats the best way to describe the sound the start up is fine just dont know what the noise is about?

    2000 Chevy Silverado 2500 4x4

    6.0L v8:great: 4L80E

    2.5 in Daystar leveling keys

    285/75/16s BFG ATs on HD wheels

    Cab lights and tool box

  2. #2
    Master Mechanic Silverado Junkie's Avatar
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    Default

    Have someone start your truck while you look under the hood so you can watch and listen to get more info on the sound.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

  3. #3
    Legend Mean_Green_95's Avatar
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    Maybe you have a midget soccer player living under your hood and the starting of the engine angers him?
    I would check the motor and transmission mounts, then maybe the exhaust.
    2010 Equinox LT
    2.4, 6 speed auto, power lift gate, remote start, bluetooth, xm.

    1995 Cheyenne C1500 ext. cab(my baby, my first truck)
    5.0, 5 speed, Silverado appearance package, power nothing, bucket seats and console Silverado, painted black interior, eBay halo headlights, eBay chrome tails, eBay cai, dual Flowmaster 40's w/no cats, 15x7 American Racing Hopsters, Walmart fog lights, SS mirrors

  4. #4
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    Does it do it the entire time??? It sounds to me like your blend door on your HVAC system. I have had 2 of my trucks do this they would pound 2 to 10 times then it would stop and eveything would be nice and quite and operate like normal till i shut it down and restarted again...
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  5. #5
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    Quote Originally Posted by caddiac View Post
    Are you missing a cat (the 4 legged ones)? Would you like to be missing a cat? "Gee honey, I heard this noise under the hood..........."

  6. #6

    Default

    Quote Originally Posted by caddiac View Post
    Are you missing a cat (the 4 legged ones)? Would you like to be missing a cat? "Gee honey, I heard this noise under the hood..........."
    That usually makes a couple thumps then a high pitched squeeling noise for a few seconds then goes quiet.
    Just ask my wife about her Jeep, took 2 hours with a pressure washer to get it all cleaned out from under the hood.

  7. #7

    Default

    yeah i think it might have been a midget and escaped we dont have any pets unless its one of my neighbors haha which would be funny but it didnt do it today at all just the other day which is kinda interesting

  8. #8
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    Yep sure sounds to me like the blending door flapping... Mine does it from time to time as well..

  9. #9

    Default

    alright thats probably what it is then it does it only when she feels like it

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