2008 chevrolet Avalanche pops up low oil pressure when on idle and the pressure guage drop to 0psi. any explanation for this?

Asked by hopilo Jul 12, 2015 at 04:30 PM about the 2008 Chevrolet Avalanche LTZ 4WD

Question type: Maintenance & Repair

2008 chevrolet Avalanche pops up low oil pressure when on idle and the pressure guage drop to 0psi. any explanation for this?

2 Answers

105

I have a 2008 Avalanche and had the same thing happen as well. Oil pressure gauge would initially read a normal level then suddenly drop. After checking the oil level I took it straight to the shop. Luckily it ended up just being a bad oil pressure sensor in my truck. If the problem wasn't caused by a bad sensor I'd assume the oil pump went bad.

1 people found this helpful.
40

Had this happen to mine at 190k miles, when pressure would drop below 25 psi on gauge you will start to hear a lifter tick when cold, once it got to temp it would keep pressure over 25 psi. Long story short it turned out to be the O-Ring on the oil pump pickup tube. Once fixed, pressure never drops below 40 psi.

4 people found this helpful.

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