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  1. #11
    Jr. Engineer BRB46's Avatar
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    Quote Originally Posted by RayVoy View Post

    You probably need a scope, or a very good DVM to read the voltage changes from the sending unit.
    I have a good DVM. Do you know what the reading should be? There are three terminals on the sending unit, not sure which I should use. I would guess zero to ?
    2006 Silverado 1500 5.3L ecsb Z71,afe pro s dry air filter, color matched tailgate handle and bezel,color matched front bow tie, led interior illumination, 5000K HID lows, Black powder coated wheels, Blacked out body side moldings, Rough Country 2.5" level/lift kit, Magnaflow muffler

  2. #12

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    Quote Originally Posted by BRB46 View Post
    I have a good DVM. Do you know what the reading should be? There are three terminals on the sending unit, not sure which I should use. I would guess zero to ?
    I don't know. I keep planning on getting a shop manual for mine, but something else always pops up.

    I would guess it is very low, a variation of a volt, or less. On some trucks, the PCM receives this voltage and passes it to the dash gauge. I don't know if it is passed as received, or changed.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

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  4. #13
    Jr. Engineer BRB46's Avatar
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    That's OK. Thanks for the added info. I will post when i figure out what fixed the issue. Leaning toward stepper anyway.

  5. #14

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    It is the most common as @99'HEARTBEAT pointed out. Good luck

  6. #15
    Jr. Engineer BRB46's Avatar
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    Well I ordered stepper motor and it is scheduled to be delivered today, however this morning, started the truck and got to end of driveway and got warning chime. Looked at DIC and it said low oil pressure and the gauge read zero. Now wondering if it might be the sending unit instead of stepper. I have no way to read real time engine data to see what pressure is actually. Oil is showing on the dipstick too. Hopefully it's not the pump. Anyone with any suggestions on this.

    - - - Updated - - -

    Just changed the sending unit and now I have the gauge working as it should. Definitely get the sending unit socket, swivel and some various length extensions. This will make it easier. Also small hands would help.

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