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  1. #1

    Default Low air flow even when it is on max airflow

    The ac is blowing cold air but on max ac it is not have very much air flow. I have all four blower speeds but when i am on position 3 just under max when i hit bumps it will speed up and slow down. I was wonder what it could possibly be if it was the blower motor control module or if it was maybe the blower motor resistor. Any ideas would be great thanks.
    Tony-1999 Chevy 1500 z71 4x4

  2. #2
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    Enkeiavalanche's Avatar
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    Sounds like the resistor to me.. Check that out under the Pass side dash Also I think you have a Cabin Air filter check to see if that has ever been changed..
    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

  3. #3

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    It is an old body style 99 chevy k1500 and i did not think they started putting cabin filters in until the new body style. Is there one in the old body style?

  4. #4
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    Well my 02 Avalanche had one.. Check under the Pass side dash or behind the glove box or owners booklet..

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