I have a 2000 Chevy Silverado 4.8 engine. When I pull my RV my oil pressure drops to zero after about 40 miles?

Asked by Sep 05, 2015 at 11:14 PM about the 2000 Chevrolet Silverado 1500

Question type: Maintenance & Repair

When not pulling anything the oil pressure runs 50
to 60.  The engine was running about 3000 rpm
uphill and engine temp is 210 pressure starts
dropping slowly when it gets under 40 it starts
dropping fast.  Take the load off engine and let
cool down oil pressure goes back up.

8 Answers

20,175

first try and change the oil/filter..go up 10 in weight or try 20-50....!

1 out of 1 people think this is helpful.
2,025

kelly is right you are probably running a 5w30 or a 10w30 oil and it is not enough depending on the mileage of the motor. like kelly said I would got up 10 in weight and if you are already running 20w50 your pump is failing on you and might need to be replaced. when ever you change your oil I would use lucas oil additive. and if you are using 20w50 oil and your going to change pumps I reccomend a hi volume pump.

86,775

An oil pump is the most common failure. But be aware that sometimes a flaw in the engine block can also cause this same problem, the pressure will be fine under normal everyday driving but when a higher loads than normal are meet the flaw opens up due to increased heat and the oil pressure drops. So if the problem is still there after you replaced the oil pump then you know what is next.

80

I agree with the oil change and the pump and would go a step or two further. How often are you pulling something? If it's a lot, consider adding a oil cooler. The other problem it could be is that you have some burned main baring's. Knowing how many miles on the motor and the size of the rig you're pulling can help us with your problem diagnosis.

The engine has 187000 miles on it, I usually run 10w30 in it the last time I got it changed the oil place put 5w30 in it I had the same Problem went and changed the oil myself to 10w30 and had the oil changed after about 800 miles to 10w40 high mileage. I pull a 24 foot bumper pull RV. I do not pull it much maby 2 or three times a year.

12,135

Check and maybe replace your oil sensor. Those have been known to go bad after a while. Very common problem. Gives strange readings. Other hat adding heavier oil, it is the next cheapest way to check and or replace. There are external oil coolers that can be added to tow vehicles, both for the engine and transmission. Look into those. I would recommend changing to a 20-50 oil in the warm months, and 10-40 for winter.

80

I agree with the sensor replacement; I have had that happen in one of my vehicles before. Have you ever run a compression check on your motor? With 187K on it, it should be ok, but you never know; a compression check is a very inexpensive check to tell you the internal health of your motor.

1 out of 1 people think this is helpful.
20

When I pulled my boat to the lake, I always ran 30W in the summer and changed in the winter to 10W40. Old engines don't have the tight tolerances they once use to. That's a lot miles and it wont hold new engine pressures, they always drop off when it gets hot.

Your Answer

Add photo

Related Questions

  • OIl pressure still drops after changing oil sending unit? 88 answers

    When truck is first started, oil pressure is normal, around 40 psi. When engine temp starts up, oil pressure slowly falls until "Stop Engine - Low Oil Pressure" warning comes on. Switch truck off a fe...

    2009 Chevrolet Silverado 1500 LTZ Crew Cab 4WD

    -

    Maintenance & Repair

  • 01 Chevy Silverado oil pressure 6 answers

    My oil pressure is at zero on start spikes to 20psi holds there while driving then drops you can here valves lifters tapping at zero before all this I changed the oil sending unit as it was leakin...

    2001 Chevrolet Silverado 1500 Base Long Bed 4WD

    -

    Maintenance & Repair

  • my oil pressure gauge drops to 0 while driving 58 answers

    While driving my oil pressure gauge randomly drops down to 0. I have to pull over and shut off my truck for a minute or so and restart it. The gauge goes up a little or some times back to normal. How...

    2003 Chevrolet Silverado 1500 Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

  • How do you know if the oil pressure gauge is bad? 21 answers

    I have a 2003 Chevy Silverado that has low oil pressure what do I look for

    2003 Chevrolet Silverado 1500 LT Ext Cab Long Bed 2WD

    -

    Maintenance & Repair

  • Oil pressure drops to zero at idle 5 answers

    When the truck is idling it Has no oil pressure and the check gauge light comes on but when I raise the rpms it goes back to 40 I rebuilt the engine 650 miles ago and it has a new oil pump could ...

    2001 Dodge Ram 1500 4 Dr SLT 4WD Quad Cab LB

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 155,168 nationwide Silverado 1500 listings starting at $1,395.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 1,830
#2 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,530
#3 Rowefast
Rowefast
Reputation 1,510
View All

Related Models For Sale

Used GMC Sierra 1500
941 Great Deals out of 62,271 listings starting at $1,395
Used Ford F-150
2,702 Great Deals out of 211,804 listings starting at $1,000
Used Dodge Ram 1500
530 Great Deals out of 12,828 listings starting at $1,995
Used Chevrolet Silverado 2500HD
328 Great Deals out of 25,711 listings starting at $2,500
Used Toyota Tundra
588 Great Deals out of 30,722 listings starting at $2,637
Used Toyota Tacoma
620 Great Deals out of 35,105 listings starting at $2,155
Used Chevrolet Tahoe
778 Great Deals out of 28,448 listings starting at $1,500
Used Chevrolet Camaro
282 Great Deals out of 38,302 listings starting at $1,250
Used Ford F-250 Super Duty
397 Great Deals out of 45,060 listings starting at $2,000
Used Chevrolet Silverado 1500HD
18 Great Deals out of 297 listings starting at $3,950
Used Chevrolet Silverado 2500
10 Great Deals out of 317 listings starting at $3,995
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
29 Great Deals out of 95,465 listings starting at $16,928
2016 Chevrolet Silverado 1500 For Sale
251 Great Deals out of 8,007 listings starting at $16,375
2015 Chevrolet Silverado 1500 For Sale
241 Great Deals out of 7,128 listings starting at $15,977
2014 Chevrolet Silverado 1500 For Sale
407 Great Deals out of 10,939 listings starting at $6,990
2013 Chevrolet Silverado 1500 For Sale
226 Great Deals out of 5,931 listings starting at $8,495