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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16769
Experience:  15 years GM master tech
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Chevrolet Silverado 1500 Classic LT: I have a 2013 Siverado

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I have a 2013 Siverado bought on 8-7-13 and at 50 mph oil pressure is 39 at idle drops to 19 #' level roads, 80 degrees, is this normal?
Welcome to Justanswer ! my name is XXXXX XXXXX i will do my best to assist you with this problem
this is the spec for the oil pressure for the active managment engine
if its 22 at 1000 RPM or higher its good
oil will think out somehwta when hot so give or take 2 psi when its very thinned out from the engine tempature
i really think your PSI is fine

22 psig 1,000 engine RPM
30 psig 2,000 engine RPM
33 psig 3,000 engine RPM
Customer: replied 3 years ago.
What is active management engine
where the computer can shut off cylinders not needed when driving to get better fuel mileage
Customer: replied 3 years ago.
Handicaped and truck to tall to get in easily, can I switch tires and wheels from 18" to smaller ones, if yes could it hurt transfer case and transmition, ( four wheel drive)' ?
yes it could hurt all those things
can you add some after market running boards to help you get in ?
Gary and 4 other Chevy Specialists are ready to help you
Customer: replied 3 years ago.
If tire size changed to smaller size, can computer be reprogrammed to allow chage, to save transfer case and transmition?
yes the computer will need the tire size calibration changed in it to make up for the tire change
Customer: replied 3 years ago.
How much smaller can I go on tire size?
thats hard to say
usually a tire store would know the exact tire size by number you can go too
Customer: replied 3 years ago.
Anything else I need to know to solve my issues?
the oil pressure issue is the question you asked that i answered