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Oil sending unit

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Any way to to replace it with one that will read accurately. I've heard of using the duramax one I think???

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There is not. The ECM is programmed for a switch and not a sending unit. 

The only way to get real oil pressure is an aftermarket gauge. 

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    There is not. The ECM is programmed for a switch and not a sending unit. 

    The only way to get real oil pressure is an aftermarket gauge. 

     

     

    Idiot gauge just like the 2nd gens.

    You can install a pipe T to retain the OEM function & give a tap for an after market guage.   I used to see this often on flybridge cruisers with 2 sets of guages (upper & lower) stations.   The "sending unit" was actually a variable resistor to ground...  power was fed from the instruments to the "sender".  There were some that had the same resistance values & others that were not.  No master list I'm aware of.

    Eventually, I've had sender diaphrams fail & leak oil...  The switches don't usually leak but can still fail. 

    The oil light switch is just a grounding switch.

    Edited by flagmanruss

    I am pulling my oil pressure reference from a plug in the cam journal which is just above the ECM. 

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    Welcome To Mopar1973Man.Com LLC

    We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.