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  1. #1

    Exclamation Strange noise coming from A/C ! Please help

    Hey everyone ! I'm having this strange noise coming from my A/C while in the off mode . It's very loud and annoying & start the minute it turn the key . The A/C works fine and while on the noise seems to go away but the minute I turn it off that annoying noise starts again . It will not go away until I shut the truck off or the A/C is turned on.
    The noise is a mixture of a squeaking & grinding noise along with some thumping and seems to be coming from behind the glove box .

    Please help me
    Thanks CHEVY2G

  2. #2
    Legend
    stephan's Avatar
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    Welcome to the GM truck club C2G.. It doesn't really make much sense that the AC would only make noise when it's off. Is it possible that the noise is always there & you're just not hearing it when the AC is on, because the fan noise is covering it up?
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  3. #3
    Legend Bigbomber's Avatar
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    Welcome!!....
    [/SIGPIC]2009 Chevy Silverado LT 1500 EXT CAB 4X4 Vortec 4.8L SFI,K&N air filter,Weathertech Floor Liners ,Weathertech Stone/Bug Deflector, Line X Spray On Bedliner, TruXport Rollup Tonneau Cover, Molded Mudguards, Viper 5701 LE 2 way Security Alarm/Remote Starter, Xm Satelite Radio,BILSTEIN 5100 rear shocks,BILSTEIN 5100 front levelling shocks,READYLIFT 2" rear lift blocks,Goodyear Wrangler Territorys -265/70R 17"

  4. #4

  5. #5
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    mfleetwood's Avatar
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    Welcome!!!


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

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