Engine rattling and Service engine now light

2008 CHEVROLET TRAILBLAZER
240,000 MILES • 6 CYL • 4WD • AUTOMATIC
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KLEILUA
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Hi, I have a 2008 chevy trailblazer LT. for the past month the check Gage light has been coming on and off. when I'm idle the oil Gage goes from the middle to 0. so I took it to a mechanic and they couldn't find no leaks or anything wrong with it. so this weekend I was driving home and all of a sudden, the engine started chugging and the service engine soon light kept blinking. so when I try restarting it, the engine just rattles.
Jul 23, 2019 at 4:29 PM
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JACOBANDNICKOLAS
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Welcome to 2carpros.com

If the oil light was going to 0, there doesn't have to be a leak. Did the shop try checking the oil pressure switch? Also, if the check engine light was flashing, that indicated a misfire.

Is it possible for you to upload an audio recording of what you are hearing? I'm not sure I understand the idea of it rattling. If I could hear it, it may help. Also, let me know if anything other was noticed such as smoke from the exhaust, steam from under the hood. And one last question. When the oil gauge indicated 0 psi at an idle, was there any ticking or knocking from the engine?

Here are a couple links you may find helpful.

https://www.2carpros.com/articles/car-cranks-but-wont-start

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

https://www.2carpros.com/articles/check-engine-light-is-it-safe-to-drive

Let me know.

Take care,
Joe
Jul 23, 2019 at 8:46 PM
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KLEILUA
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yes I will upload tomorrow! but I'm not sure! he checked inside the hood and under the car & advised me that it could possibly be the dashboard itself! obviously it was more than that because now I'm having this problem! When the service engine light came on and the engine begin to shake, there was no smoke from exhaust, no steam under the hood but I did notice a gas like smell. also when the engine started rattling it felt like it was only coming from the passenger side under the hood.
Jul 23, 2019 at 9:03 PM
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JACOBANDNICKOLAS
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Okay, then it was a misfire. Have you scanned the computer?
Jul 23, 2019 at 9:45 PM
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KLEILUA
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Not yet
Jul 23, 2019 at 9:57 PM
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JACOBANDNICKOLAS
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Welcome back:

That is what I recommend doing. Scan the computer to identify which cylinder was causing the misfire so we can focus on that specific one.

Here is a quick video showing how a scanner is used.

https://youtu.be/YV3TRZwer8k

I realize most people don't own a scanner, but often times a parts store will lend or rent one to you. Do that and let me know what codes are found.

Take care,
Joe
Jul 24, 2019 at 10:31 PM
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KLEILUA
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im actually familiar w/ the scanner! thank you & yes I will keep you informed once I take it to be scanned
Jul 24, 2019 at 11:01 PM
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JACOBANDNICKOLAS
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Sounds like a plan. Let me know.

Joe
Jul 24, 2019 at 11:19 PM