Question about GMC Cars & Trucks
Well like they say it first thing I will do is check the oil make sure it's all the way to the top and if it's full check the oil pressure sensor by unplugging it in grounded plug see if it comes all the way up or if you unplug it see if the light goes off on the pressure goes off that's meaning the pressure sensor could be an open position is bad need replacing
Posted on Feb 09, 2019
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Posted on Jan 02, 2017
u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.
Posted on Aug 12, 2009
Left ( driver's side ) front of the engine on the 5.4L engine.
This is shown to be at the end of the baffled area of the intake, the edge of the pleated area farthest from the airfilter ( looking at the engine, the left side of the pleated folds ).
When you locate this, look down the front of the engine.
The connector is a black 1 pin connector with a White w/ Red Stripe wire to it.
You might have to remove the factory air intake plastic housing to see it.
Posted on Nov 13, 2009
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
Posted on Feb 01, 2010
Low oil pressure can and will destroy your engine. Check the oil level. If it's full or just a little low (1quart or little lower) then you have a serious problem already. If it is lower than a quart and a half, re-fill it and check pressure. If it's OK, then find the leak and fix it. If after filling it pressure does not return to normal then you already have a serious problem. have the actual pressure checked with a mechanical gauge and proceed from there. (likely bad bearings) If main bearings are involved, unless you remove the engine and re-grind the crankshaft and clean out the oil passages, you are wasting your $. Usually cheaper to replace the engine and more reliable as well.
Posted on Feb 01, 2010
Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!
Posted on Jun 06, 2010
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