i have a 1993 gmc sierra z71 with a 5.7L engine. Engine was replaced with a used one. My question is that "Why does my oil pressure drop down to 0 KPA after it has been running for a few minutes, but pressure is normal when the engine is cold? I replaced the oil pressure switch and my engine was running fine for about a week, now when the engine heats up the gauge on the dash drops to 0 kpa.
have the same problem?
Monday, October 26th, 2009 AT 6:59 PM