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Re: Duramax 6.6 Idle Oil Pressure
Posted to HD/Fleet Forum on 2/4/2005

Hi Mike. Since you didn't select a model year I used 2003. Hot idle minimum oil pressure spec is 14 psi, minimum hot oil pressure @ 1800 rpm is 42psi. Oil relief valve opens @ 64 psi.

If the owner is going by the dash gauge, its just an "idiot" gauge. Plenty... Login to read more.