what causes low oil pressure

Asked by May 06, 2016 at 06:00 PM about the 2003 GMC Sonoma

Question type: Maintenance & Repair

low oil pressure when idling

3 Answers

78,565

Bad oil pump bypass valve, worn engine bearings, missing oil galley plugs. etc.

1 out of 1 people think this is helpful.
31,645

Defective oil pressure sender or gauge can indicate low pressure when the pressure is normal.

1 out of 1 people think this is helpful.
38,005

So verify by checking the oil pressure with a mechanical gauge.

1 out of 1 people think this is helpful.

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