My husband and I bought a used 2018 Chevy Tahoe with the 5.3 engine that everyone seems to hate a year ago. It now has 109,000 miles on it. In the spring we got a check engine light that suggested the oil sensor was the problem so we got a new one put in. A few months later, same thing, got another new one put in. Last week, check engine light came on again so took it to Mavis (check engine light was off at this point) where they said pressure switch was okay but oil pressure was low and we needed to have it checked out.
We took it to the local Chevy dealership (didn't buy the Tahoe there) to have it diagnosed. This is what the person who took the car in told us the mechanic said: oil pressure was 40 at idle then at some point it dropped down to 19 psi (I may be missing a few points). I drive the Tahoe and this is basically what I see: around 20 psi at idle and 40 psi on highway. Based on the readings, he said they would need to take apart the engine to find the root cause because it could be a number of things and it would cost a lot to do that. He recommended replacing the engine.
This is what the paperwork said when we paid for the diagnostic testing: "...upon starting truck at idle oil pressure was right at 40, as engine warmed up pressure was dropping low, attempted o command 2nd state oil pressure with solenoid, solenoid does work and status change with command but pressure does no really change (1-3psi). after approx 15m of idle time and road test found oil pressure coming down to 19 psi. based on conditions will recommend engine assembly based on age/miles would require several hours of tear down to maybe find root cause, root cause could be a failing filter, could be a cam bearing starting to wear or a main bearing. oil psi comes up with rpm, CUSTOMER DECLINED REPAIR. (LOL)
My husband wants to put heavier weight oil in and ignore the problem until we can get back home in a few months where his mechanic brother can look at it.
Comments? Suggestions? What would you do?
Thanks. Sheila
We took it to the local Chevy dealership (didn't buy the Tahoe there) to have it diagnosed. This is what the person who took the car in told us the mechanic said: oil pressure was 40 at idle then at some point it dropped down to 19 psi (I may be missing a few points). I drive the Tahoe and this is basically what I see: around 20 psi at idle and 40 psi on highway. Based on the readings, he said they would need to take apart the engine to find the root cause because it could be a number of things and it would cost a lot to do that. He recommended replacing the engine.
This is what the paperwork said when we paid for the diagnostic testing: "...upon starting truck at idle oil pressure was right at 40, as engine warmed up pressure was dropping low, attempted o command 2nd state oil pressure with solenoid, solenoid does work and status change with command but pressure does no really change (1-3psi). after approx 15m of idle time and road test found oil pressure coming down to 19 psi. based on conditions will recommend engine assembly based on age/miles would require several hours of tear down to maybe find root cause, root cause could be a failing filter, could be a cam bearing starting to wear or a main bearing. oil psi comes up with rpm, CUSTOMER DECLINED REPAIR. (LOL)
My husband wants to put heavier weight oil in and ignore the problem until we can get back home in a few months where his mechanic brother can look at it.
Comments? Suggestions? What would you do?
Thanks. Sheila
