Question about 2003 Chevrolet Suburban 1500

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My oil pressure gauge reads over 80 and need to know where to locate the oil pressure switch on a 2003 surburban

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It should be pretty close to the oil filter.

Posted on Sep 07, 2009

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Where is oil sending unit located?


You're vehicle has two sensors for the oil,an oil pressure sensor switch & oil pressure sensor.If oil pressure gets below 6psi,the oil pressure sensor switch will turn a dash light on to let you know the pressure is at a dangerously low amount.So if you've got a dash light on,the pressure sensor switch needs to be replaced.Its located to the right of the oil filter housing,on a 2.0 liter.Its located to the left of the oil filter housing,on the 3.0 liter.
If your oil pressure gauge is reading inaccurately,you need to replace the oil pressure sensor instead.Its located near the ac compressor.

Oct 15, 2015 | 2003 Ford Escape

1 Answer

Oil pressure gauge goes to 80 and stays


Another gauge needs to be connected to the car to check that oil pressure sensor or the gauge itself is not the problem.

If an independent gauge shows the same readings I would suspect a sticking oil pressure relief valve.

Dec 28, 2012 | 2003 GMC Yukon Denali

1 Answer

Oil light came on and low oil pressure or no oil pressure. But oil level is fine. 2003 Chevy sierra


spend the 12 dollars and get a universal mechanical oil pressure gauge, remove the oil sending unit on truck and screw new gauge into and start truck. Does it read pressure? I know people will say just replace oil sending unit but i like to visually check for a true oil pressure than to trust a light, at least you will know what pressure your motor has. if you have pressure then replace the sending unit. Most of the time when the sending unit goes bad your oil pressure gauge in the truck will run at 80 psi all the time. Since you have a light the sending unit just says it isn't getting pressure which turns a light on. So be safe and do as i suggest, if there is no pressure at the mechanical gauge then i hate to say it but you may have a bad oil pump. I honestly just think you have a bad sending unit,if you want just replace it and if lights go off thats good, but you still don't know what the pressure is and if you feel comfortable with this then do so.

Feb 04, 2011 | 2003 Chevrolet Tahoe

2 Answers

When I start my vehicle, Mmy oil pressure gauge goes to 80 and stays there.


Change oil pressure sending unit. This should clear your problem up. If you need assistance for removal and install I will be glad to help.

Sep 15, 2010 | 2003 Cadillac Escalade

1 Answer

Oil pressure gauge is reading 80 psi. I had the


The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.

Jul 20, 2010 | 2003 Chevrolet Silverado 1500

2 Answers

Why is my oil pressure gauge on my 2003 hummer h2 always read 80 when the vehicle is running, back to zero when shut off?


because when the engine is shut off, the oil pump is also shut off, therefore no oil pressure. no problem here!

Mar 24, 2010 | 2003 Hummer H2

1 Answer

Just started up my 2003 chevy and my oil gauge went to 80


the oil sending unit could be out or the pressure guage is malfunctioning is the service engine light on?

Jan 11, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Oil pressure gauge reads 80 while running


could be one of two things, oil pressure switch (located on top of engine behind intake) or instrument panel cluster, if your vehicle has under 70,000 miles, it's covered under warrenty

May 12, 2009 | 2003 GMC Sierra 1500

1 Answer

Oil pressure gauge reads 80 psi with engine off and pegs running


That is probably a defective oil pressure gauge or a broken oil pressure sender, it reads 80 psi just because that is the maximum value allowed.

Pressure can be verified by reading it with a gauge tool.
If you really have pressure over 70 psi when engine is running then start replacing the oil filter, and check that the oil lines from pump are not obstructed, if there is nothing in there then replace oil pump.

If instead the gauge reads 80 with engine off, that is a defective pressure gauge.

Feb 25, 2009 | 2003 GMC Sierra 1500

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