Question about 1999 Chevrolet K1500

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Gm5.3l lowoilpressure low oil pressure at idle. good oil pressure when driving at road speed.

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Posted on Jan 02, 2017

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  • 38 Answers

SOURCE: Low Oil pressure light in idle at stop

Depending on the amount of miles, maintenance records, or how hard the car has been driven either by a previous owner, or by yourself. The engine's main crankshaft bearings or the connecting-rod bearings could be excessively worn.

Also, it could very well be a wiring problem to the sensor and/or computer causing the problem.

Posted on May 16, 2008

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SOURCE: Chevy suburban 2000 5.3 low to no oil pressure at idle

maybe a dumb question, but have you checked the engine oil level (not trying to be rude) . if you have check the type of oil filter you are putting on. But you mention tapping noises....do they increase slightly as engine rpm increases then dissapear. if so, i would wager that the noise you are hearing would be the hydraulic lifters. the reason you hear them is that they are not getting a sufficient amount of oil pressure...your oil pump might be dead or dying...would go that route.

also, ensure that you are using the correct weight of oil in your vehicle (follow manufactures recommendations)

hope this helps.

Posted on Jul 08, 2009

agent91
  • 2100 Answers

SOURCE: oil pressure low when idling. When running engine

That is normal, my truck , if it had a light , it would be on, the gauge goes to about 0 when idling and flies right back up when going, When it stops moving is when I'll get worried about it. You might try heavier oil this summer and see if that changes anything. Go with a 10w40. If you are already using this, try straight 40 one time. Hope this helps.

Posted on Mar 14, 2010

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  • 447 Answers

SOURCE: truck has low oil pressure

The gauges on some of these weren't overly accurate so I would suggest having someone test the oil pressure with a mechanical test gauge temporarily installed in place of the oil pressure sending unit to see what the actual pressure really is with the engine fully warmed up at an idle [this is when the pressure would be at it's lowest point] If you have 15 psi or above then that's about normal. If you have less than 10 psi then that's getting fairly low and could be the result of worn internal bearings. If you have good oil pressure but your gauge reads very low then you might just have an inaccurate or faulty sending unit that isn't reporting the right pressure reading to the gauge. Once you have the actual pressure tested you'll know where to look next.

Posted on Jun 26, 2010

  • 157 Answers

SOURCE: 2008 1500 suburban, pickedcar up after getting

If your sending unit is one wire, unhook it from the sender and place a jumper wire from wire to ground. Turn ign on, gauge should pep high PSI. Two wire plug, place jumper between contacts of wires (unplugged). Same thing. What this does is isolate the gauge. If gauge pegs on test, replace sender. If it does it again with new sender, it's the pump. But it's probably the sender.

Posted on Nov 02, 2010

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My oil light comes on after higher speeds while idling at a traffic light.


It may be your oil pressure transmitter switch at fault. There's many different oil pressure transmitter switches. Here are some generic images:
oil pressure transmitter switch Google Search
It could also be that your vehicle is due an oil/filter change.
Is your oil level ok?

It's unlikely to be your oil pump at fault.
  1. Check your oil level
  2. Is the vehicle due an oil/filter change?
The oil pressure transmitter switch simply tells the engine 'low oil pressure'. This usually happens at idling speed due to a faulty transmitter switch, low oil level or there's a need for an oil change as the old oil is no longer up to the job. Oil pressure switches are easily changed.

The important thing is that you aren't getting a warning light when driving at speed. If your oil level is okay and it isn't due an oil/filter change - it probably is the oil pressure switch at fault.

For your own peace of mind try adding an oil additive.


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Nov 03, 2015 | Cars & Trucks

1 Answer

I have a Ford F350 Lariat Super Duty Diesel with the 6.0 engine. wha would cause the oil pressure to drop complete when I come to a stop but run normal when going down the road?


Your oil is under pressure as it is circulated through the engine, and at low RPM there is less pressure pumping the oil around. With the broken dipstick, I presume there is an oil-pressure leak and at normal operating speed there is enough capacity to maintain proper pressure, but the leak is more than the engine can overcome at low speed. I would suggest replacing the broken dipstick.

Oct 15, 2014 | 2003 Ford F350 Super Duty DRW SuperCab

1 Answer

Oil light comes on when the car is idleing or when I let off of the gas it blinks what could be the problem?


Low oil pressure maybe? Oil pressure will vary depending on engine speed-higher speed=more psi, lower speed=less psi. If there is a mechanical reason for low oil psi then idle is when it will be low enough to turn on or flicker the light. Also, you could very possabily have a slugged up oil pick-up screen.

Aug 17, 2014 | 2005 Nissan Sentra

2 Answers

Oil gauge drops low at idle


Low oil pressure at idle can be caused by an engine with worn rod or main bearings due to (usually) high mileage . This however does not mean the engine is still not serviceable as long as the oil pressure is low only at idle. The pressure should at minimum get into the normal range at anything above idle speed.Not much oil pressure is really necessary at LOW speed. At low speed, as long as there is oil getting to the bearings, even at low pressure, you are OK. In a high mileage engine the oil pressure is often low at idle simply because the oil pump is turning slowly and cannot maintain higher pressure between the larger than normal crankshaft and bearing clearances. As speed increases the pump turns faster and supplies more oil and the pressure should go higher. Low pressure as long as it is only at idle is not a problem. However at higher speeds the pressure should be in the normal range. Such a worn engine can benefit from higher viscosity (thicker) oil such as 20W-50 in above freezing weather and 10W-40 in winter. That will increase idle pressure and the thicker oil film maintains a better film between the worn parts

Apr 08, 2012 | 2002 Jeep Grand Cherokee

2 Answers

The oil pressure on my 94 Trooper flucuates from around 10 at an idle up to 55-70 when I'm driving down the road. I changed the oil sending unit when I changed my oil thinking they both might help but I...


This seems pretty normal. So long as the pressure does not fall while driving, you're good.
When Idling there is very little stress on the engine, and it requires little oil pressure to maintain.
Additionally, the pressure is directly related to the rpm of the engine as the oil pump is driven by the engine. As the rpm increase, so does the pressure. The pressure should be stable at a given rpm.

The pressure on the high side is good. On the low side is adequate (idle). You did not say how many miles, but the only way to change this is to rebuild the engine with new bearings and seals. I don't think that's somthing you want to do. Sounds fine for now. Leave it alone.
Don't fall for a new oil pump. That is very rarely the issue.

Feb 07, 2011 | 1994 Isuzu Trooper

2 Answers

When stopped at lights oil light flashes.. My oil level is fine. What could it be?


this is a common sign of a bad oil pressure sender, but could also be caused by low oil pressure, a sender is cheap,but it"s always smart to do a pressure test first with a mechanical gauge,you can obtain a mechanical gauge from most automotive parts stores. then you"ll have to locate and remove the oil pressure sender and install the gauge you bought. make your test at warm idle you should have at least 25 psi below that you may very possible have worn engine bearings making it impossible for the engine to have any better oil pressure at idle. if you have 25 or greater psi of pressure at idle replace your oil sender and you"ll be back on the road

Dec 30, 2010 | Ford Taurus Cars & Trucks

1 Answer

Oil lamp lights at 750rpms


750 rpm?

your revs are too low.

The engine speed drives the oil pump via the timing belt.

too low revs = poor pump speed = low pressure.

I'll bet when you rev the idle speed faster, the warning goes off?

Apr 30, 2010 | 2004 Chrysler Sebring

2 Answers

Low oil pressure


If the engine is not making any noise.It is probably the oil sending unit that is defective.If you want to be sure you will have to install a pressure gauge and check the pressure when the vehicle is at normal operating temperature.If it is above 10 psi then replace the sending unit.It is located on the back of the motor on the block by the left cylinder head.You might need a special socket for it.Hope this helps.Good luck.

Jan 12, 2010 | 2004 GMC Yukon

2 Answers

Oil light comes on at very low rpm


It IS NOT Advisable to Drive this Vehicle Untill This Problem is AT LEIST DIAGNOSED, You Need A MANUAL OIL Pressure TEST, to Determine If OIL PRUSSURE is SAFE @ >>Oil Pressure at idle speed with engine at operating temp.min. bar 0.5 Regulated Pressure bar 4.3
If it Is ok First On List Is Oil Pressure Sensor But if it's Low> Replace
Oil PUMP
Obviously Inspect Wires To Sensor / Sensors Before High Dollar Parts Are Resorted to.

Aug 04, 2009 | 1999 BMW 318 ti

2 Answers

Oil Pressure drops but returns when i restart


your engine needs flushed .what is going on is idle has less pressure than driving and the sump is picking up dirt and debris but when you turn off or idle the debris falls off the sump.

Mar 12, 2009 | 2001 Chrysler Voyager

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