Question about 2004 Chevrolet TrailBlazer

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Gas gauge not working and oil pressure goes to 80 pounds

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Common problem on the 03-06 Trailblazer instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Trailblazer fuel gauge problems

Posted on Sep 30, 2010

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Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Trailblazer instrument cluster repair

Posted on Oct 08, 2010

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96 chevy cheynne 5.7 vortechas about 40to50 pounds oil pressure when first sart in morning and when it gets to temp. it drops to 20to25pnds and at a stop it goes to 0 and gauge light comes on until i give...


Well it could be the sending unit for the gauge.
But odds are the oil pump or engine bearings are worn out.
As the engine warms up, the metal spaces expand and the oil gets thinner. The oil pressure drops some under normal conditions, but not more than 10 or 15psi. Normal idle pressure with the engine warmed up is probably 25psi.
You could check oil pressure with a mechanical gauge to make sure its not the sending unit.
Once the oil pressure starts staying below 20psi for long periods you'll start hearing noises.

Apr 13, 2013 | 1996 Chevrolet C1500

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2005 silverado 4x4 oil pressure gauge goes all the way to the right to 80 and does't move only when key turn to off.


Either you have way to much oil in the truck or the pressure switch is no good.

Mar 16, 2013 | Cars & Trucks

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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 pressure gauge goes up to 80 pounds


80 lbs is good. It's more like around 50, it's probably the oil sending unit. Take a look at it aand make sure it in't leaking. If there is any oil covering it and none coming from above it is leaking. I don't know engine size, but they are usually located around the oil filter.

Apr 29, 2011 | 2000 Jeep Grand Cherokee

2 Answers

Oil pressure gauge shows 60-80


the oil sending unit that screws in the block beside the oil filter may be faulty,
the worst thing would be the oil pump its self the regulator valve on it

Jan 26, 2010 | 2000 Jeep Grand Cherokee

2 Answers

Oil pressure guage pushes to 80 when not idling.


In an engine in good condition, oil pressure is a function of RPM. Higher rpm, higher pressure. Whne coasting downhill, in gear, the engine rpm will increase, hence, the oil pressure will go up, as required, and as expected.

There is nothing wrong with your engine, unless the oil pressure goes excessively high under any regime. Low oil pressure is a sign of low rpm, or under load, a sign of worn parts.

Nov 22, 2009 | 2000 Jeep Wrangler

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92 cherokee very high oil pressure


sounds to me like you have a bad oil pressure sinding unit

Feb 02, 2009 | 1996 Jeep Cherokee Country

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