99 GMC Suburban oil pressure gauge?

Question

I have a 99 gmc burban that i keep in pretty good shape. I just made a road trip and the oil pressure gauge is starting to play tricks and the check guage light is comming on can this be fixed by having the oil changed? I change it every 4 months w/ 5w 30 synthetic some one please help i love this truck

Answer 1

Your Gage is electric and has a wire connected to it from the dash, it may just be loose. There is also a possibility that it may be shorting somewhere.
If neither of these is true, I suggest you hook up a manual pressure Gage and check cold and hot pressures.
You could have a broken spring in the oil pump regulator.
Note, sensors wear out too.

Answer 2

I was surfing the web looking for an answer to this exact problem I have a 99 Chevy Suburban and it is doing just about the same thing I use 5W-30 synthetic oil change it ever 3months and my check engine light has come on too with the oil pressure jumping from like 60 to 20 depending if its idling or moving now the low oil light has not come on even when the pressure was reading really low. It first started the 17th of November but then the light went off the next day and no problems but two days ago it started again now the temp has been in the teens to 30's here where I live, well with in the range of the oil, I have proper level of oil and was thinking it could be my oil pump but am looking for any and all other advise for this problem too.

Answer 3

You can go up to 15,000 miles on the new synthetic oils. I use synthetic 10w30 in my '85 1/2 ton and change it every year or two. Conventional oils I'll change twice a year or more often.

Is the "check gauge light" the little red light with the picture of an oil bottle or (OIL) on it??? This is the low oil pressure warning light if that's the light coming on. This means you have dropped to nearly zero oil pressure because somewhere in the system the oil is flying out or it's not getting pumped into the block from the oil pump. It does happen that the pick up tube will come loose in the oil pump and not suck up enough oil to keep the system pressurized if someone swapped the motor or rebuilt it and installed a new oil pump and pick up tube/screen and did not force it in far enough and then weld just a very small spot of the tube to the pump to hold it solidly in place.

I'd take it to the Chevy dealer and have them pull the sending unit out of the block and hook up one of their own pressure gauges and see what happens. They will record cold and hot pressure readings and write them down.

You need to know early on so you don't break down on the road with a mechanically damaged engine.

Good Luck!

Answer 4

99 Gmc Suburban

Answer 5

decrease rigidity at idle is fairly standard. as properly to the different solutions, additionally verify the oil rigidity with a reliable mechanical unit to make constructive the rigidity is truthfully low and not a foul gauge or electric powered sending unit. some blocks have an oil gallery faucet by applying the oil clear out boss to ascertain decrease engine/ oil pump rigidity as properly to the top oil rigidity the place the producing unit sender port is placed to help be sure if it quite is a pump or bearing concern. Switching to a thicker oil like 10W-40 or 50 or 15W30, etc....could help for a at the same time as too....do no longer use Slick 50 that's in simple terms 50 weight oil and a few graphite that may plug oil filters in chillier climate.

Answer 6

Most likely the sender is the problem. Can you get to the codes to help you?

Oil change will not help unless the oil is so old and thick that it has blocked part of the sensor.

Answer 7

depends on whatthe gauge is doing........
If it is all over the place, it might be a faulty gauge or perhaps a ground wire that is loose.....
If there is an internal engine problem, changing the oil will not cure it.