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Thread: New, old truck

  1. #1
    Join Date
    Jun 2007
    Posts
    3

    New, old truck

    I just purchased a 1999 Silverado 2500, with 6.0. Should the fan clutch on this always sound like a 757 about to take off. I know others don't continue to do that. But this one never quits. Also, would I gain any mpg by changing to a 3:73 rear,as opposed to the current 4:10.
    Last edited by badgto; 05-10-2009 at 12:38 AM.

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Either its seized up or your engine is running hot. Time for some electric fans and a 34" radiator if it didn't come with one.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Should have the 34" radiator already and 2500's have a stiffer clutch than half tons. There is a chance the older iron head 6.0 like yours has an even tighter clutch. Most common clutch failures are 03+ that free wheel.

  4. #4
    Join Date
    Jun 2007
    Posts
    3
    Thanks for the info, as far as running hot, the gauge stays just under 210. The fan howls from start up to shut off, cold or hot. I may be interested in the electric fan setup though. I do believe it has the 34" radiator already.Again thanks!

  5. #5
    Join Date
    Dec 2008
    Posts
    14
    my 2000 that recently left me sounded like a swamp plane all the time as well. Could just be a tight fan clutch(aftermarket replacement).
    Old wrencheads never die, they just lose compression. I want a tatoo on my beer gut that says "alcohol injected"

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