Hi Everyone,
I have a 2004 Envoy XUV SLT 4.2L 4WD that has recently started indicating low oil pressure. I bought the Envoy new and have always changed the oil on schedule with Moble1.
I've read several threads here about this problem and mine is just like the rest - it only occurs at idle after the vehicle has been driven more than 10 miles (so it's fully warmed up). The consensus seems to be that the problem is almost always caused by either the switch or the wiring. I replaced the pressure switch with the correct ACDelco replacement and still have the problem. My gut says the wiring is an unlikely culprit - the logic being that faulty wiring would cause an incorrect signal to be sent to the computer at any RPM, not just at idle. Am I off base here?
Which probably means that the issue is a failing oil pump. The local GMC dealer says that the book calls for 15.1 hours of shop time at $140/hour plus parts. When you add tax that's starting to look like a $3,000 repair on a vehicle that's probably only worth $2,500.
I love my Envoy! Does anyone have thoughts on a cause other than the oil pump (or something just as expensive)?
Chris
I have a 2004 Envoy XUV SLT 4.2L 4WD that has recently started indicating low oil pressure. I bought the Envoy new and have always changed the oil on schedule with Moble1.
I've read several threads here about this problem and mine is just like the rest - it only occurs at idle after the vehicle has been driven more than 10 miles (so it's fully warmed up). The consensus seems to be that the problem is almost always caused by either the switch or the wiring. I replaced the pressure switch with the correct ACDelco replacement and still have the problem. My gut says the wiring is an unlikely culprit - the logic being that faulty wiring would cause an incorrect signal to be sent to the computer at any RPM, not just at idle. Am I off base here?
Which probably means that the issue is a failing oil pump. The local GMC dealer says that the book calls for 15.1 hours of shop time at $140/hour plus parts. When you add tax that's starting to look like a $3,000 repair on a vehicle that's probably only worth $2,500.
I love my Envoy! Does anyone have thoughts on a cause other than the oil pump (or something just as expensive)?
Chris