1999 Tahoe 4WD 5.7L
A couple of months ago I realized I was having low oil pressure after warm up at idle, and the gauge light would come on. After talking with a friend, he suggested I pull the oil pan and clean the pick-up on the pump.
When I pulled the pan, I found the pick-up in the bottom of the pan. The bottom of the pan had a small dent that I straightened out when it was off. I am pretty sure the pan was in that condition when I bought it in 2010.
I installed a new pick-up on the pump, as the old seemed too loose a fit.
Everything was fine for a month or two with normal oil pressures at all times.
Then last month the same thing started to happen again. Low oil pressure light come on after warm up at idle.
I decided to pull the pan and this time replace the complete pump. When I started the disassembly, I found that the Oil Filter was on very tight, and was very hard to get off.
When I did get the pan off, everything looked OK, with the pick-up in place.
As long as I have it apart this far, I will now change the oil pump.