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  1. #1
    Sr. Apprentice
    Join Date
    Mar 2014
    Pikeville kentucky

    Default 07 5.3 avalanche engine noise

    Can anyone tell me what this sounds Like to them. Is it a knock, lifters. This is killing me. Had nothing but trouble since I got this stupid truck

    It's a 2007 5.3 avalanche with 120,000 miles on it. All the fluid levels are fine with no engine light on

    I no the AFM in these trucks are awful and are a major problem. But don't they consume the oil. Mine don't. Help.

  2. #2


    I am not much help, but have you tried using a stethescope (or long screwdriver) to try and further pinpoint the noise. Not always the easiest thing to do though.
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  3. #3


    It's got a little burp, burp, burp to it, maybe an exhaust leak.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  4. #4

    Enkeiavalanche's Avatar
    Join Date
    Apr 2010
    Piermont,NY, back in Northern NJ now, But may be in IL soon....


    Sounds like mine at 114K No Problems...
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  5. #5


    Check your exhaust manifolds they could be cracked they normally crack under the rear exhaust port.

  6. #6


    Sounded to me like an exhaust leak and some possible ticking in the top end. Almost sounds like lifter noise but not sure without being there. Also for a split second I thought I heard a slight metallic scraping sound from around the idler pulley.

  7. #7


    My old ears don't work so well now, BUT, I thought I heard idler pulley noise...

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