Low Oil Pressure 2004 Suburban

Asked by Mar 03, 2016 at 12:31 PM about the 2004 Chevrolet Suburban 1500 Z71 4WD

Question type: Maintenance & Repair

I need help!!! I replaced the oil sending unit twice! 1 from
auto zone and 1 from GMC. Still reading low, added Lucas
Oil stabilizer still reading low, did go up some with Lucas.
Runs great, just while sitting idle oil pressure low beeps.
When get over 1000 rpm beeping stops! What should I do?

4 Answers

90,815

Did you check the screen in the oil pressure passage, known problem with them, you can search it on you tube.

Yes we did it was clear

90,815

Ok I would install a manual oil gauge just to make sure the oil pressure is actually low, if it is then you need to replace the oil pump, if not then find the failure in the electrical system that is giving the wrong signal.

Yeah the oil pump is the next thing I will try we hooked the manual gauge up to it. It's reading low

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