Automotive

No Oil Pressure 2009 Chev Silverado

  • Last Updated:
  • Jan 7th, 2019 8:17 pm
[OP]
Newbie
Dec 4, 2013
2 posts
Whitehorse

No Oil Pressure 2009 Chev Silverado

My Chev is a 5.3 & has approx 420,000 km on it. New transmission about 3000 km ago. My engine light went on about 130 km ago when I was in middle of nowhere. I checked oil, it was ok. I continued to drive and gauge dropped from 12 o'clock position (where it normally sits) to 9 o'clock position, waveered between 8 & 9 the rest of the way home. Got to town, and gauge rose a bit. When I shut off motor it was back at 9 o'clock. Sat for 3 days. Started today, warning lights came on saying basically to shut off motor, which I did, so couldn't use scanner. I class it as inoperable right now. Temperature outside has dropped from Around -10 to -29 C in those 3 days it sat. Can't call shop cuz it's Sunday, but would like some kind of idea before I call. Expensive fix or not??? Thx. . .
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6 replies
Temp. Banned
Jun 18, 2008
5095 posts
4629 upvotes
Montreal
I would first check the oil pressure sending unit hopefully that is the problem, cheap fix. Other than that it it could be the oil pump going out or just a pickup tube gasket common issue on high mileage GM Vortec. In those cases the oilpan has to come off so more costly.
Member
Dec 25, 2006
467 posts
319 upvotes
Winnipeg
Worst case scenario - you need a new engine.
Best case you have a faulty pressure sensor or faulty oil pump.

Seeing your pictures I think the mileage on your truck is only part of the story as I'm sure you have alot of idle time on it as well.

Could be anywhere from a couple hundred $$ to repair to thousands. With the information you've given I think it's going to be time for a new engine.
People will believe what they want to believe whether fact or fiction.
'tis most frustrating when they aren't open to see and/or learn which is which.
Deal Guru
User avatar
Feb 11, 2007
14867 posts
15717 upvotes
Oakville
You should still be able to use your obd2 scanner with the key in the accessory position.
Sr. Member
Jul 26, 2010
919 posts
86 upvotes
eastern Ontario
the oil pressure gauge on my 02 s10 died years ago. I get good pressure on cold startup and then when hot it drops. On really hot days the check gauges light goes on. A little additional rpm has the gauge go up enough to turn light off.
On my 86 S10 again cold start was fine. When hot it went off scale high.
My 07 impala started having the computer tell me to shut off engine because of low oil pressure. It would go on and off. In this case problem was when cold and ok once heated up. Google told me this was common so a new sender solved it. And only a few months later other issues had us send it to kenny u-pull
Sr. Member
Jul 20, 2012
675 posts
213 upvotes
Toronto
Hopefully it's just the sending unit, it's in a bad spot but a cheap repair. Ottofly is correct, the pickup tube o-ring fails. I had the same low oil pressure warning in my Z06. It turned out to be a broken main bearing. Funny thing the engine sounded fine, luckily for me the damage was minimal.

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