Low lubrication in 5.3 vortec engine of silverado

Good evening, I have a 2005 4x4 vortec sale and presents me with low oil precion, already bought the new oil pump but I would like advice on how to change it or a manual of this engine, highly grateful to the Q can help me thank you ......

Bring distribution chain you will have to disassemble it, you will have to take out the carter, then besiege the links where the marks is of different color lighter, remove the water radiator to work better, the mutual belt of multi -channels, because the pump goes with the chain behind the chain with gears,

You have to place the time then you take the radiator the cibch you take out the Damper you verify the time then you take the lid chains you take the chains suspend the kmotor to take out the card changes the oring that carries down xq that is your problem since you bought the pump changed if you do not want to change. ALLI OIL COLLECTOR YOU FIND AN ORING THAT YOU MUST CHANGE IT XQ OIL FLAG AND NU UP THE PRECTIONS WITH WANT ANOTHER SUGGsence You send me a messages

Thank you very much I will download the carter and change the oring

Another corduroy thing checks well that the collector is very clean the filter that carries at the entrance Lavalo well with tener or beating and so you do a job well and complete