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GMC tranny guage question

Discussion in 'Chevy Trucks' started by PTTP08, Dec 14, 2013.

  1. PTTP08

    PTTP08 Senior Member
    from mn
    Messages: 183

    I have a 98 gmc 3/4 ton. I added a extra 2quart pan and a gauge on the pillar. But while I am plowing it will jump up to 240 and sit there for a second and jump back down to 160. it seems real erratic. After I'm done plowing it calms down and sits around the normal 160. faulty gauge? pan slosh from the fluid? bad ground? open to idea's
     
  2. maxwellp

    maxwellp PlowSite.com Addict
    Messages: 1,112

    Check the place where you put the sending unit with a laser temp gun when it is showing 240 and see if it really is.
    I had a autometer temp gauge that had the wrong sending unit installed. I would go up really fast.
     
  3. starfiresx

    starfiresx Member
    Messages: 30

    Where do i find one of these extra capacity pans?

    Joe
     
  4. PTTP08

    PTTP08 Senior Member
    from mn
    Messages: 183

    Summit racing .com I bought a tci pan complete kit I buy this for all my trucks
     
  5. Rat_Power_78

    Rat_Power_78 Senior Member
    Messages: 176

    If its an electric guage (I would guess it is) check the connection at the sensor. If they get corroded, that can cause erratic guage movement, improper readings, etc. Is it an aftermarket guage?
     
  6. PTTP08

    PTTP08 Senior Member
    from mn
    Messages: 183

    Yes its a b&m one
    And its electric as well buts it only like 6month
     
  7. mnglocker

    mnglocker Senior Member
    Messages: 923

    In MN 6 months is about the life span on any sensor under the truck. Clean it up with some CRC electro-motive cleaner, then pack the connector with dialectric grease.
     
  8. PTTP08

    PTTP08 Senior Member
    from mn
    Messages: 183

    I will do that