I have a 4x4 2006 Colorado that has 155k on the engine. Once the engine is at normal operating temp, I get the low oil light. I have since replaced the oil pump and oil pressure sensor, but it didnt fix the problem. The truck is lifted and in really good shape other than this oil pressure issue. I just hate to keep throwing money at it if there really isnt a fix for it. According to my local Chevy dealership, parts for the 3.5 are extremely hard to get and I cant find any crate 3.5s. Have any of you gone through this situation?