I have a pontiac aztek that isnt getting oil to the top end of the engine, thinking its the oil pump, need advice

There isn't one.

https://www.fixya.com/cars/t25783998-fuel_safety_shut_off_switch_located

https://www.google.com/search?q=2005+pontiac+aztek+fuel+cut+off+switch+location

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http://www.bing.com/videos/search?q=2001+pontiac+Aztek+fuel+pump+won%27t+get+power&FORM=HDRSC3


http://www.bing.com/videos/search?q=2001+pontiac+Aztek+fuel+pump+won%27t+get+power&FORM=HDRSC3

No regulator. Low pressure pump.

If the engine has the required amount of oil, and you have replaced the sending unit, and the engine is knocking, I would say the oil pump has failed.
Chances are the bearings are damaged enough to require the engine be rebuilt. You won't know for sure until someone takes the oil pan off and checks the bearings.

you have to drop the gas tank and remove the sending unit, the pump is at the end of the unit

Your oil pressure sensor could be bad.

Pontiac Aztek, Montana 2001-05 w/o (DIC) Driver Information Center; Torrent, Ascender 2006

Turn the ignition to ON, with the engine off. Fully depress and release the accelerator pedal slowly three times within five seconds. Turn the key to OFF If the CHANGE ENGINE OIL’ message comes back on when you start your vehicle, the engine oil life system has not reset. Repeat the procedure.

Pontiac Aztek, Montana 2001-06 wI (DIC) Driver Information Center

urn the ignition to ON, with the engine off. Press the MODE button until the DIC reads ‘OIL LIFE LEFT/HOLD SET TO RESET Press and hold the SET button until 100% is displayed. You will hear three chimes and the “CHANGE ENGINE OIL” message will go off. Turn the key to OFF. If the “CHANGE ENGINE OIL” message comes back on when you start your vehicle, the engine oil life system has not reset. Repeat the procedure.

Good luck

Fuel in Cylinder Is CAUSED Most Likley BY THE MISSFIRE Check Spark at that Cyl. & Correct that. ALSO Fuel in oil Breaks Down Viscosity of the OIL so I Would Eliminate the Fuel in OIL Problem First to Determine if No Oil Pressure in top end

ok, i'm gonna take a stab in the dark- i have never seen teh motor of an Aztek, but you should remove the fan shroud, remove the hoses- top and bottom- remove the screws from the brackets and it should pick strait up.

sounds like a valve or lifter maybe a rocker arm take the tappet cover off and have a look you might be suprised