When in park I can rev the Engine and the oil pressure gauge will move to about 3/4 and then go back to about a little past 1/2,,,But when I'm driving the gauge stays @ a little past 1/2 even if I (not stomp)but push on the gas pedal to acc to any speed and It wont move @ all..I guess the pressure stays constant?..dunno..This is all under 4000RPM as this is a new truck and I wanna try to break it in a little first before I peg it..lol....Is this normal?.Maybe a bad oilsending unit?.Or just break in time...My Silverado's oilPressure gauge always moved even new..Also 2 days after I had drove it home went to work in the morning turned the key and nothing, turned again and it took about 4 sec for it to start,Np since though.

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