Question about 2002 Chevrolet Trailblazer Ext

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2002 Chevy Trailblazer Oil Pressure

Oil pressure gauge is spiking well over 80 while driving. Truck does not appear to be making any unusual noises and is running fine. Oil level and all fluids are good. Is this a faulty sensor and if so, where is the pressure sensor located?

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  • Anonymous Jan 06, 2009

    Oil Pressure gauge goes to zero while driving

  • Anonymous Jan 31, 2009

    while driving the oil pressure gauge hits 80 and beyond but will return to 40-50 at idle speeds

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  • 294 Answers

Common issue on teh 03-06 Trailblazer instrument clusters, it's caused by failing stepper motors on the cluster's circuit board. It is fixable, check out this page for more on how to get it fixed - Trailblazer oil gauge broken

Posted on Sep 30, 2010

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1 Answer

When the oil pressure is low on a Chevy trailblazer can it stop the fuel pump form working? How do I know if my oil pressure is low? Help me please


Yes the pump can be affected by low oil pressure.
I am assuming you don't have a gauge.
If the oil pressure is low, the engine should be making noise. If the sending unit is faulty, it could be causing the problem even if oil pressure is normal.
You can jumper the fuel pump relay to check the pump, and you can either replace the oil pressure switch or hook up a gauge to check oil pressure.

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1993 chevy pickup z 71 driving down interstate and check gauge light came on and oil presure dropped to 0. Truck died and cant start again


It could be the oil pressure sending unit, or the engine could really have no oil pressure.
If the oil pressure dropped to zero at highway speed, I would expect the engine to lock up or at least make alot of noise.
You may have to tow it home and check the oil pressure with a mechanical gauge, or replace the sending unit to see if the gauge on the dash reads pressure.
The fuel pump gets power from the pump relay at startup, then runs off power from that oil sending unit when the engine is running.

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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.

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THE OIL PRESSURE GAUGE DROPS TO ZERO AND LIGHTS ON THE DASH FLASH WHEN STOPPING ON MY 2002 CHEVY TRAILBLAZER


poor oil circulation may need either more oil or a new oil pump, any other symptoms?

It could just be the pressure sensor, as this is cheaper get it looked at first.

Hope this helps
Regards
Dan

Feb 01, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

2002 chevy trailblazer. 1.oil pressure gauge drops to zero at idle spuraticly 2 where is the sensor that controls the dash guage note: when i unplug the sensor @ the oil filter and the one on the passenger...


the sensor is on the side of the engine block. there's two thing that monitors oil. a pressure switch turns you oil light on and you oil pressure sensor the operates your gauge, start with your sensor. that is near you oil filter that is where it gets it pressure reading from

Jul 24, 2009 | 2002 Chevrolet TrailBlazer

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Check gauge light can come on for a number of different things, from Low fuel to low oil pressure to high engine temperatures. When the light comes on check all the gauge's and see whats causing it, one or more of the gauge's will be showing an issue, Low fuel or low oil pressure, Low battery power. Any of the mentioned things can cause it... Figure out whats causing it then you can remedy the situation...

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2005 trail blazer with oil pressure over "80".


you may have too much oil in the truck drain it and put in5 quarts of 40 weight oil

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