Question about GMC Cars & Trucks

1 Answer

My 96 gmc sierra 4.3 oil pressure dropped to 0 while driving it,after changing oil pump,oil and filter.she got sluggish but never shut down,I can still start,but values are tapping now and she get hot

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • GMC Master
  • 42,108 Answers

Bad news
cam shaft bearing and mains and big end bearings are all shot
possible crank journal damage
time to consider a replacement motor

Posted on Apr 23, 2017

  • Juan Jules
    Juan Jules Apr 23, 2017

    I changed those out 4 months ago, and only drove the truck 2 months

  • Bill Boyd Apr 23, 2017

    unfortunately when an engine is run with out oil it doesn't matter when it Was done ,significant damage can be done in minutes

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

WAS TRAVELING IN MY GMC 2006 SIERRA TRUCK WHEN MY OIL PRESSURE DROPPED TO 0 IS THIS A PROBLEM ?


surely it is a problem and major one. DO NOT run the engine at all. You have to carry some checks to confirm whether your gauge is not lying. Check whether you have the correct oil level fist. Check whether your oil filter is a good and non burst . Check by means of oil pressure tester the pressure of your oil, Check whether the oil switch is accurate or is not working. Check the wiring on the oil switch, finally if neither of the above have problem,check the oil pressure pump in the engine is not the culprit. Good luck.

Aug 17, 2012 | GMC Cars & Trucks

2 Answers

1993 gmc sierra k1500 5.7 V8, fuel system shuts down while driving. Have replaced fuel pump, fuel filter and fuel relay.


Check to make sure oil pressure switch is not sticking or gummed up and connections are tight. Your oil pressure switch is also a safety feature that will shut down fuel pump in case you're in an accident and/or rollover.

Mar 04, 2011 | 1993 GMC Sierra K1500

1 Answer

What will cause a truck to lose all oil pressure and the engine to shut off while driving down the road?


If wires came off oil pressure switch or if switch went bad, it would shut down truck immediately. Your oil pressure switch performs 2 functions; oil pressure to gauge.light and it's also a safety feature that if you're in an accident or rollover, when oil pressure drops it shuts off power to fuel pump. I'd start there. The reverse is also a possibility, if fuel pump fails, truck shuts down = no oil pressure.

Feb 28, 2011 | 1990 GMC Sierra

3 Answers

Oil pressure guage stays at 40 psi on ign/engine shut down, but drops to 0 psi when ign is turned back on, and then on starting of engine operates normally... What's up ???


the oil pressure gauge only gets a reading when the engine is runningas the oil is being curculated. when you shut the vehicle off it should go back to zero and be there until the vehicle cranks back up. i hope this helps

Feb 05, 2011 | 2002 GMC Sierra 1500

2 Answers

LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED


have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Mar 11, 2010 | GMC Sierra 1500 Cars & Trucks

1 Answer

We just replaced the fuel pump on my 96 gmc 1500. and it has no power going to it, as it did before... it has an inline fuse. wheres the fuse on it?


the fuel pump runs off the engines oil pressure switch upon starting. when the oil pressure is up to normal psi the fuel pump relay takes over until you shut the engine off.

Mar 03, 2010 | 1995 GMC Sierra C1500

1 Answer

I own a 2002 GMC Sierra 3/4 ton. I have cleaned the injectors, changed fuel filter, changed oil and filter, replaced tires, but she is still fluttering and then dyeing. The RPM's drop and it feels like I...


hello,
You have a bad oil pressure switch. I know that sounds strange but It feeds the fuel pump. Some times randomly the PCM does a self check and shuts off the fuel pump relay when it does this it runs off power from the oil pressure switch. The easiest way to confirm this as a diagnosis is to unplug the fuel pump relay when the engine is running. If it dies when you unplug it thats it. if not you will probably need a fuel pump or possibly just a cap and rotor (tune) but I belive it is the oil pressure switch.

Roy

Nov 13, 2009 | 2002 GMC Sierra

1 Answer

After about 2 hrs of driving my oil guage on my 2003 sierra goes down to almost 0. I stop and shut the truck off for about 5 min. and the guaga goes back to normal for about 1 hour then the same problem...


A failing oil pressure sensor may be to blame, need to verify the pressure is actually falling to zero with a mechanical gauge. If the pressure on the mechanical gauge does not drop to zero under the same conditions then suspect the pressure sensor. If it is then
I would suspect the oil pump pick up screen is becoming clogged with debris. As mileage accumulates sludge can accumulate in the engine, as bits of it come loose they settle in the oil pan. Extended driving allows it to collect in the pick up screen until it is restricted, upon shutting the engine down the particles drift back to the bottom of the pan. There is also a more remote possiblilty of the bypass valve in the oil pump itself being the culprit, but I think the chance is fairly remote.
Good hunting

Oct 30, 2009 | 2003 GMC Sierra

1 Answer

96 GMC pickup w 350 engine, starts hard after like 8 hours.


could be your fuel pump relay you should check to see if the pump runes for about 3 sec. when you turn the key to the on position. It should if not the oil switch is turning on the pump after you achieve pressure.
if not check the relay. also with the pressure gauge hooked up check if your pressure drops off fast after you turn off the car. if so you need ether a pressure reg or a fuel pump.
hope this helps

Jun 20, 2009 | 1996 GMC Sierra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

36 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...