Trailblazer engine oil pressure

SOURCE: In my chevy s10 the oil pressure drops and the engine stalls

Possible warped cylinder head, or cyclinder head gasket.

SOURCE: Low Oil Pressure on 1992 Chevy 1500 Pickup Truck

1992 silverado pickup has a problem with the oil pressure Gage on the dash board fluctuate when i put break on or accelerate the gas 

SOURCE: changed oil pressure switch,still no oil pressure

The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,
ChevRev

SOURCE: 1991 chevy S10 blazer fluctuating oil pressure

I assume from the year it has high mileage. With mileage comes wear in these engine's bearings allowing oil pressure to drop because of the excess clearance between cam and bearings, also the crank and bearings. When the engine is hot and idling the oil is thinner and goes by the bearings quicker. If you have good oil pressure while driving, I'd leave it alone, maybe use a thicker oil or some lucas additive. My 89 does the same thing sometimes in the summer, but don't remember it doing it this summer. I use Mobil-1 and an AC Delco filter.

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Ronny Bennett Sr.

• 6988 Answers
• Posted on Apr 21, 2010

SOURCE: oil pressure at 0 on 2005 trailblazer

It sure sounds like the oil sending unit is at fault,now sometimes,not always,the oil sending unit will seep oil or leak oil if they go bad,but like I said,not always,change the unit,and the oil and filter just for precaution.