Been a member awhile but don't post much, but i ran into some problems and need some help. Bought an 01 Silverado a couple months ago and recently the oil gauge started jumping until it gets warm, but once it does it stays at 60. The real problem started last night leaving work..started the truck up to let it warm up but heard some lifter tap and looked oil pressure had dropped to 0, I turned the truck off and started it back up and the oil pressure went back to normal...Any help is appreciated.