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Oil pump change questions

Cbings

By Cbings
in Engines & Drivetrain

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Cbings New Member

Cbings

Posted
Posted (edited)

Hey everyone, I recently have had the misfire on #6 issue and started my troubkeshooting processes. One of the early things I changed was the oil pump. Prior to the change and since I bought the truck is has always hovered around 1/4 of the gauge and of course would increase when getting on the accelerator.  After the change it hovers 3/4 area and practically pins the meter when getting onto it. This really worries me because I have had the truck for over 6 years and was always in the 1/4 area. It's a 2014 gmc sierra with the LT4 or L83 engine. Trying to figure out if I have a faulty oil pump or if there is a calibration process? Is there something I'm doing wrong? Thanks in advance. 

Edited by Cbings
CamGTP Senior Enthusiast

CamGTP

Posted
Posted (edited)

It's a L83 engine if it's a 5.3.

 

From the sounds of it, the 2 stage oil pump is stuck in the 2nd stage if the pressure doesn't go below half or 3/4. That stage of the pump isn't suppose to operate until 3,500rpm if I recall correctly. Nothing has to be calibrated for a new pump.

 

Very low chance that the oil filter is causing the oil pressure to be so high.

Edited by CamGTP
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Cbings New Member

Cbings

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Posted

Thanks for your reply. I did recently change the oil filter. Maybe that is also adding too it.  What do i do if it's stuck in the stage 2?

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

More than likely need to replace it again. Could have been a bad pump out of the box.

 

Usually you get a P06DD code if you have low oil pressure but I don't think there is a code for when the pump is putting out too much pressure all the time.

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
14 hours ago, Cbings said:

Hey everyone, I recently have had the misfire on #6 issue and started my troubkeshooting processes. One of the early things I changed was the oil pump. Prior to the change and since I bought the truck is has always hovered around 1/4 of the gauge and of course would increase when getting on the accelerator.  After the change it hovers 3/4 area and practically pins the meter when getting onto it. This really worries me because I have had the truck for over 6 years and was always in the 1/4 area. It's a 2014 gmc sierra with the LT4 or L83 engine. Trying to figure out if I have a faulty oil pump or if there is a calibration process? Is there something I'm doing wrong? Thanks in advance. 

 

This will sound weird but when you unplugged the solenoid, and it can give a voltage spike that will do all manner of oddities. Actually, any sensor interrupt can do it or other things.  Mine was the MAF sensor when I cleaned it, and the pump pegged until I did a force reset of codes that didn't actually exist. It's possible. Not saying it is. 

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