Q: lost all oil pressure, replaced the oil pump, low oil sensor, oil pressure sensor, oil pan gasket,

asked by on

2001 GMC Seirra 5.3L V8 Vortec, lost all oil pressure, replaced the oil pump, low oil sensor, oil pressure sensor, oil pan gasket, timebelt cover gasket therostat/housing, truck cranks but still no oil pressure..if u rev motor and keep it above 2500 rpms, there will be around 15lbs of oil pressure, take foot of gas pressure drops to 0 and truck dies...what am I missing???

My car has 210000 miles.
My car has an automatic transmission.

The fuel pump will not stay on if you loose oil pressure. This is why it is shutting off. The loss of oil pressure may be from bad crankshaft bearings or camshaft bearings. The engine oil pan should be removed and the oil pump needs to be checked to ensure that you put in the pick up tube seal to the pump and connected the pump to the block. Then remove at least one main bearing cap and inspect the bearings for excessive wear and crankshaft damage. If you need some help with this, consider YourMechanic, as a certified technician can help diagnose the issue with your oil pressure firsthand and help you fix it accordingly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. lost all oil pressure, replaced the oil pump, low oil sensor, oil pressure sensor, oil pan gasket,

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: My transmission died on me

Transmission issues will often give you small signs that a trip to the shop is needed. The warning signs can be subtle shifting problems like a slightly delayed or harsh shift, sometimes even a delay before the transmission goes into...

Q: AC/heater fan runs constantly even with switch off

The most common cause of this problem is the blower motor control processor mounted in the A/C evaporator case. I'd start by checking that first I were you. I you need some assistance however, feel free to contact a professional...

Q: Car stopped three times in one day

Hi. If the code is still present after both sensors have been replaced, and the engine is stalling, further diagnostics is needed. First of all, a new sensor doesn’t always mean a good sensor, especially aftermarket ones. Check the sensor...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...