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  1. #1

    Default Colorado wiring diagrams?

    Hi, new to the sight. I searched this forum without success trying to find a wiring diagram for the Colorado.
    My wifes 2005 is having issues with the blower fan switch. Intermittent operation on speeds 1,2 and 3, USUALLY works on 4, sometimes doesn't work on any of them. But its seems that if I hit a dip in the road, that the fan will come back on if it hasn't been working, and vice versa.
    Still under factory extended warranty, but due to the fact that I fix my own stuff, this one is really bugging me and I can't find any Chiltons or Haynes manuals for the Colorado so I can T/S myself.
    If anyone knows of a book available, or has access to wiring diagrams for this truck, I would appreciate the help.

    1980 K20 Shortbox
    Dana 60 front/14 bolt FF rear, Detroits 4.56 gears
    38.5x15 Boggers

  2. #2


    Just a random guess, but I'm going to guess that the connection at the blower is loose. On my suburban I've been having a similar issue because the connection at my blower is loose, and I haven't fixed it yet. Try that..

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 277K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half

    There are 10 kinds of people, those who understand binary, and those who dont...

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  3. #3
    Master Mechanic TahoeFever's Avatar
    Join Date
    Sep 2007
    Now IN Auburn AL :)


    this is the online version of the chiltons repair manuals

    hope this helps

    btw Welcome to the site
    04 Tahoe LT 5.3L stock MSD 8.5mm Wires
    Gigbson Duels Straight Exhaust, Parrot 3100 Bluetooth
    K&N 77 Series CAI, Sirius Radio
    De-badged, Valet Dei remote start
    5000k HID
    Federal 100watt air horn

  4. #4


    Hey thanks for the help and the responses, I will check the connection at the blower motor, and I found the Chiltons manual at that website!
    Hopefully, I can get it fixed now.



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