2008 Trailblazer oil pressure guage at zero but driving fine?
I have a 2008 Chevrolet Trailblazer LTZ 5.3L V8 140,000 km. Two days ago when I
started the car and began driving, I noticed the “Check Gauges” light had come on and
the oil pressure gauge needle was exactly at 0. I immediately stopped my car and shut
down the engine to check the oil level which was absolutely fine. I wasn’t sure what to
do, so I carefully drove to my destination without any problem. There was no engine
power issue or any other noise. There was no engine oil warning light or any message
like “oil pressure low” on the driver information center. Everything seems to be fine
except the “check gauges” light and the oil pressure gauge reading. I have driven more
than 300 km since then. What should I do?
The most common problem is the oil pressure sender Then the wiring from the sender, I have seen a few of these break right at the sender. The ideal thing to do would be to have the actual oil pressure tested and make sure you don't have an underlying engine problem, if that checks out then start to diagnosis the gauge circuits.
For some reason the oil sensors about this time of ownership are failing. They are not expensive. On the top rear left side of the engine is where the sensor is. It will take a 1 1/16 deep socket to remove it and put in a new one.
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