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Heater blower / fan ???

Discussion in 'General Chevy & GM Tech Questions' started by nhbowtie, Sep 17, 2011.

  1. nhbowtie

    nhbowtie New Member

    Just the other day i had to use my defrost on my 2004 2500 pickup. The fan was working fine i shut the truck off to run in to the bank came out started the truck and now the fan is not working. Is there a relay or a fuse that i should look for and where would i be looking?



    99'HEARTBEAT Moderator Staff Member ROTM Winner Platinum Contributor 1000 Posts

    Dave does the Fan/Blower, work on any level's?? or does it Not work at all??..........there are 2 Fuses......1 for the Climate Controls which is located on the inside Fuse Panel, on the side of the dash when you open the driver side door......the 1 for the blower is located in the fuse panel, in the Engine Bay......when you remove Both panels, on the underside is a Diagram of the fuse's.
  3. nhbowtie

    nhbowtie New Member

    The fan isn't working at all.

    Thanks for the reply.

    I'll go look at the fuses

    99'HEARTBEAT Moderator Staff Member ROTM Winner Platinum Contributor 1000 Posts

    The reason I Asked about the blower/fan.....is if you find that the fuses are O.K.........than the Problem is most likely with the Blower Motor Resistor, which is a Common problem on the 99" to 06 Trucks.......if that turns out to be the case, that it is the Resistor, G.M./Chevy has just come out with a Coverage adjustment.....where they would replace the Resistor, at No Charge......so make sure to check with your Local Dealer regarding this.
    Last edited: Sep 25, 2011
  5. nhbowtie

    nhbowtie New Member

    I looked at the fuses and they seem to be in good shape.

    I gues i'll need to call the dealer.

    Thanks for the reply.

    99'HEARTBEAT Moderator Staff Member ROTM Winner Platinum Contributor 1000 Posts

    Dave below is the G.M. Service Bulletin that goes into Detail Regarding the Problems with the Blower Motor Resistor,

    Special Coverage Adjustment
    Bulletin No.: 11046

    Date: April 07, 2011

    Subject: 11046 - Special Coverage Adjustment - Heating, Ventilation, and Air Conditioning Blower Not Fully Functional on All Blower Speeds, Inoperative, or Runs Continuously with the Ignition Off

    2003-2006 Chevrolet Avalanche, Suburban, Tahoe
    2003-2007 Chevrolet Silverado
    2003-2006 GMC Yukon, Yukon XL
    2003-2007 GMC Sierra
    Equipped with Manual HVAC (CJ3) or Heavy Duty Heater (C42)

    Due to part availability, owner letters will be released in phases starting with older model year first. Owners for model year vehicles not included in first phase owner mailing will receive an owner advisory letter.

    The letter will inform the customer that parts are not yet available and that another letter will be sent to them when parts become available. A copy of this letter will be attached to the dealer message announcing this bulletin.

    In the meantime, if a customer brings their vehicle to the dealership with the condition described in this bulletin, repair the vehicle using the parts called out in this bulletin.

    Condition.......On some 2003-2006 model year Chevrolet Avalanche, Suburban, Tahoe; GMC Yukon, Yukon XL; and 2003-2007 model year Chevrolet Silverado and GMC Sierra vehicles equipped with a manual heating, ventilation, and air conditioning (HVAC) system (CJ3) or heavy duty heater (C42), the interface between the electrical terminals of the relay Resistor Module and the Wiring Connector that powers the module may be incapable of conducting higher current levels for sustained periods of blower motor operation. In addition, moisture and other contaminants may enter the fresh air intake plenum and contact the internal circuit of the module or corrode the terminals. Either of the above may cause the relay resistor module or wiring connector to overheat, resulting in one or more of the following symptoms:

    - The HVAC blower may not function on certain or all blower speed settings
    - A burning plastic smell or smoke may be present in the vehicle
    - The HVAC blower may run continually with the ignition in the OFF position

    IN VERY RARE events, if the above Symptoms are Ignored......A FIRE Could Occur.

    Special Coverage Adjustment,.......This special coverage covers the condition described above for a period of 10 years or 150,000 miles (240,000km) whichever occurs first, from the Date the Vehicle was Originally Placed into Service.......Regardless of Ownership.

    Dealer are to install a New Blower Module Connector......and the Repair will be made at No Charge to the Customer

    Inportant.......For vehicles covered by Vehicle Service Contracts, All eligible Claims with repair orders on or after April 8 2001 are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with Repair orders prior to April 8 2011 must be Sumitted to the Service Contract provider.

    Vehicles Involved,
    Involved are certain 2003-2006 model year Chevrolet Avalanche, Suburban, Tahoe; GMC Yukon, Yukon XL; and 2003-2007 Model year Chevrolet Silverado and GMC Sierra Vehicles equipped with a Manual HVAV (CJ3) or Heavy Duty Heater (C42)

    Dealers are to confirm vehicle eligibility prior to beginning repairs by using the Applicable Warranties section in the Global Warranty Management system.

    Last edited: Sep 17, 2011
  7. nhbowtie

    nhbowtie New Member

    Well I just got off the phone with my local dealer and it will be repaired under warranty next week.

    Thanks for all the info.

    99'HEARTBEAT Moderator Staff Member ROTM Winner Platinum Contributor 1000 Posts

    That's Great hear Dave, that the Dealer is taking care of this for You.....:great:

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