I have a 2000 (NON TURBO 2.9) and I had my mechanic do this job due to the notorious Stop Car/No oil pressure light. After the job the light STILL Came on. I asked him how many o-rings he replaced and he said "all 3" I thought i read somewhere there were around 5...Did he miss some? He said he did nothing around the oil pump itself. Can anyone shed light on my problem, Please...Dan

 

There should be 5
2 Between the pan and motor
1 for the pickup tube
2 for the oil filter crossover pipe to oil cooler.

 

If the crossover/cooler pipe o-rings don't get replaced can it cause low pressure indicator? I am immagining those are the two he may have Missed. I hate to have him go back in if these have no effect on the pressure warning I get at idle...thanks for youre imput on this...really!

PS: are they inside the pan too?