Question about 2003 to 2004 GMC Envoy Fuel Pump Module & Sending Unit for V8 5.3L

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Where is the oil sending unit on 2003 envoy - 2003 to 2004 GMC Envoy Fuel Pump Module & Sending Unit for V8 5.3L

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Posted on Oct 20, 2013

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Why is my 2007 envoy denali oil pressure dropping?


check oil level in sump. You may have to remove the sump to check for cracked oil pick up line . Check oil pump pressure regulator . replace oil filter as it may be blocked and dropping the oil straight back to the sump.

Mar 14, 2014 | 2007 GMC Envoy Denali

1 Answer

My 2004 gmc envoy is giving me ans oil pressure low warning and then shutting off my 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.

Oct 02, 2012 | 2004 GMC Envoy

1 Answer

Gas gauge does not read correctly


Most likely the baffle in tank is loose getting in way of sending unit or sending unit is defective. And be sure ground for sending unit is ok.

Dec 28, 2011 | 2003 GMC Envoy

1 Answer

Oil pressure falls and vehicle stalls(oil pressure is good 45 psi)


Hello
The most commopn cause of this is that the oil pressure sending unit on the engine is defective, if the pressure drops to far the fuel pump is shut off.

Dec 27, 2010 | 2003 GMC Envoy

2 Answers

Warning light come one and oil pressure gauge goes to zero. could this be somthing other that the oil pump ?? how hard is oil pum to change on 2005 envoy xl ?


check oil sending unit first. could be that it has failed and is sending a bad signal to the instruments. if it is the pump the engine has to be removed to change the pump.

Nov 18, 2010 | 2005 GMC Envoy Xl

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

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

1 Answer

2002 gmc envoy oil pressure flux. maybe.


An oil pressure sending unit is really not an expensive item nor difficut to change . Probably the answer , sending units faulter frequently. Hope this helps

Apr 13, 2009 | 2003 GMC Envoy

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