Hi everyone i am a new GP buyer, 1st time gm buyer in 20 years, figured i'd try it again as i really like the GP over competitors, bought an 04 GT with 100k km on it. While i was driving a couple days ago the low oil pressure light came on momentarily at idle.only happened the one time. my oil was good (overfilled actually by 1 liter)i made it good. my dealer figures it is the oil pressure switch going. Can anyone tell me where the switch is located on the 3800 series III? and is it a hard replacement? Thanks Dan