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Oil pressure gauge

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by taydan47, Nov 19, 2010.

  1. taydan47

    taydan47 New Member

    My 2003 Silverado's oil pressure gauge just started to max out when engine is started. Is it my gauge, or the pressure sending unit giving a false reading?
  2. 99'HEARTBEAT

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    It could be the Sending Unit as you have mentioned or it could be the the Stepper Motor.....is going out.

    Edit:.....I should have mentioned...What and Where the Stepper Motor's Go.....Below are some pictures of the Stepper motor's and where they go on the Dash Cluster,

    There is one stepper motor for each Gauge,

    [​IMG]

    .
    [​IMG]


    [​IMG]
    Last edited: Nov 19, 2010
  3. mfleetwood

    mfleetwood Rockstar 4 Years ROTM Winner 5000 Posts

    Welcome to the Club!!!
  4. longrange223

    longrange223 New Member

    what does the stepper motor do?
  5. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    Pull the wire off the sender, put the key on. While the key is on, touch the wire to ground. Should read zero when the circuit is open (not touching) and the gauge should peg when you short the wire to ground.

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