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blower on 05 hd only works on 5

Discussion in 'Chevy Trucks' started by grosser397, Sep 14, 2009.

  1. grosser397

    grosser397 Senior Member
    Messages: 196

    hey my blower fan only works on 5 i put a new nob swtich in and it didnt fix it. whats the problem?

    2004 2500hd ls
  2. haejinjoe

    haejinjoe Junior Member
    Messages: 28

    Provided this is a manually controlled system, you likely have a blower resistor problem. It is usually located near the blower motor under the passenger side glove box area. Sorry I don't have a specific location for you but that is where it usually is at.

  3. ss502gmc

    ss502gmc Senior Member
    Messages: 473

    yes, Def the blower motor resistor located to the left of the blower motor under the hush cover.
  4. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

  5. marylandbigb

    marylandbigb Member
    Messages: 86

    usually the blower resistor gets so hot it melts the connector and wiring going too it gm has a bulletin pertaining too this u need a new resistor and wiring connector contact a dealer fairly common problem