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Re: My oil pressure gage on my 2004 gmc envoy needle has...
It is very possible that the stepper motor that drives the gauge is going bad and needs to be replaced. There are services that repair clusters, check on Ebay.
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No damage will occur. Have you checked the oil pressure with a manual test gage? If not do that and please understand GM oil pressure gages are prone to reading high pressure when the sender is defective.
Since changing the oil sender made no change, dash gauge may be dead. Hook up cheap mechanical gauge to see what is really going on. Ticking when first started is probably a lifter and may not be a big problem. How many miles on engine?
It needs to have the oil pressure manually tested with a mechanical pressure guage. If good oil pressure is found, you most likely have a bad sending unit.
A very common problem is for the actually tiny stepper motor on the back of the guage itself to go out. Common to go out on 1 or more guages. Good thing is, very cheap off of e-bay and easy to install.
if you put any gas in the fuel tank the fuel gauge needle should move toward full mark.if not you have a faulty fuel level sending unit.its in the fuel tank attach to the fuel pump assembly.
You need to replace the oil pressure sending unit, this is what tells your gauge what the pressure is. For future information if your oil pressure drops again and its a real failed oil pump within a few minutes you will internally damage the engine. I would get a new Oil Pressure Sending Unit. Let me know if you have any questions.... Thanks!
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.
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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