Question about 2005 Chevrolet Tahoe

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Was driving last night notice oil pressure drop to 0 . Check the oil this morning it is fine and the gauge is reading 40. What can be the problem

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Common issue with the 03-06 Tahoe instrument clusters, it's caused by failing stepper motors on the cluster's circuit board and it can be repaired. Check out this page for more on how to get it fixed - Tahoe oil gauge fix

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 Tahoe instrument cluster repair

Posted on Oct 08, 2010

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1 Answer

Oil level is normally at 40 however while driving it suddenly dropped to the 0 mark the it begins to read all over the gauge. Oil level is good I NEED HELP!!!!!


The reading on the gauge is not oil level, that is oil pressure. If you have lost oil pressure you either have a bad oil sending unit, bad gauge, or an actual pressure issue. If you can connect a manual gauge and verify if you do or do not have pressure is the first step. If you do have pressure with the mechanical gauge then you simply need to figure out if you need a sending unit or a gauge. If you do not have pressure with a mechanical gauge the only answer is internal with a clogged sump tube, failed oil pump, or spun bearing.

Jan 16, 2016 | Cars & Trucks

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While drivingoil pressure is at 40. after half hour of highway driving oil pressure drops to 0 or below. i stop and restart oil pressure comes back. ideas?


Could be the Oil Pressure Sending Unit. I do recall GMC having issues with the instrument cluster on 2003's. Try slapping the dash when the gage reads zero.

Mar 17, 2013 | 2003 GMC Yukon XL

1 Answer

I have a 2005 trailblazer. The oil pressure gauge is ffine running around 40-50. When I come to a stop it drops to zero (under 1000rpms) I change the oil last night and it stilldoes this


The correct way of checking this is to put a mechanical test gauge on the engine and check the actual oil pressure. (your gauge is electro mechanical and it could have a "dead spot" in it.) However, if you don't have a test gauge, buying one or having a shop test it will cost you far more than the actual sending unit would. Therefore, providing that the engine isn't knocking or tapping while the gauge reads "0" ( which would indicate that the pressure was indeed low) I'd suggest that you replace the sending unit and see if it corrects the problem. The unit generally costs around $25.

Jun 23, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

2001 Jeep Grand Cherokee Laredo approx 147000 miles. Recently notices oil pressures going up to 80psi periodically when driving. If I turned off the engine and restarted it would read normally. Within...


Very first thing you need to do is install a mechanical pressure gauge on there to verify what you see on your gauge. If the actual pressure is low, then it's time to start looking inside the engine. If not, then you need to trace out the electrical problem but will know the engine is safe.

Jan 29, 2011 | 2001 Jeep Grand Cherokee

1 Answer

99 jeep grand cherokee 4.7 v8 oil pressure drops from 40 at idle to 0 when given rpms. Will come right back to 40 when you let idle again. I have removed pan and checked screen. It was clean. Original...


From what you just said, it sounds like the problem may be the dash gauge itself. I have only seen one oil pump act like that (mine) .... in that case the pump drive gear was turning on the shaft and slowing down as rpm increased but that is so rare as to be a non issue, especially when the mechanical gauge reads fine. I'd either replace the dash gauge or just install the mechanical gauge permanently on the dash. Doubt if oil in the plug will do that but you can check the plug, clean it and check the integrity of the wires going into it just to be sure.

Dec 14, 2010 | Jeep Grand Cherokee Cars & Trucks

2 Answers

03 gmc envoy with 5.3 140000 miles. Oil pressure reading fluxuates between 0 and 40. When problem first started pressure read 80. When vehicle was new it stayed at midpoint (40) vehicle has plenty of oil....


There may be a loose wire or the gauge or sending unit may be going bad. The first thing I would do is to hook up a temporary oil pressure gauge, not using the old one at all. With this watch gauge while driving and see what readings you get. If the readings still jump around you have a pump that is getting weak and failing, If that is the case the pump should be replaced, but with high milage you may consider rebuilding the entire engine. If the readings stay normal start checking for a loose wire at gauge or sender. Then check sender, then gauge and replace as needed.

Oct 02, 2009 | 2003 GMC Envoy Xl

1 Answer

2002 jeep wrangler oil pressure gauge drops


When the gauge is at 0, is there any noise from the engine (tick, knock etc?) I would have someone put a mechanical gauge on there and read true pressure.Your driving pressure seems OK but if the low number is "real" something is wrong!

May 30, 2009 | 2002 Jeep Wrangler

4 Answers

Oil pressure reading in 2003 gmc envoy


No problem with the oil pressure, the norm is between 40 to 60. Anything lower then 40 you have low oil pressure and anything above 60 then you have high oil pressure which is caused by a blockage in the system.
What is common is the oil pressure gage fluctuating for the first 200 miles if the oil pressure sending unit is getting worn. Good maintenance will keep the engine clean and running good but the oil pressure sending unit is inexpensive and easy to replace. Next time you do an oil change you can have them change the sending unit.
Good luck and hope this helps. You can pick up the sending unit at Auto Zone and most auto parts store and will have the step by step to replacing it. If you do attempt to replace it. make sure you DO NOT USE any Teflon tape or silicon on the threads, they are tapered and need a good ground to the engine for proper readings.

May 28, 2009 | 2004 GMC Envoy

3 Answers

Oil pressure on a 2004 5.3 liter silverado at idle is around 20


The pressure to be most concerned with is the reading in gear at idle with engine warmed up...Low end really should not be below 20. If pressure wanders, change the sending unit and check actual pressure with a mechanical gauge if necessary. The age and quality of your oil, as well as temperature all play a part in pressure, as well as internal wear from time & miles of use. If pressure changes with rpm, that is normal. 40psi is good while driving.
need more info just ask.

Apr 27, 2009 | 2004 Chevrolet Silverado

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